[ { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42414:42418:1'} The data starts from January 12 12:00 and ends on January 13 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Strong Pacific weather front will move ashore over Washington, Oregon, and northern California in the last 12-hour period, bringing the greatest areal coverage of precipitation. Immediate coastal areas and coastal ranges of Washington, Oregon, the northern half of the Cascades, Vancouver Island, and coastal British Columbia will experience the brunt of this system due to the track of the strongest upper-level dynamics. High winds are likely in coastal sections due to a tight surface pressure gradient.\n\nUpper-level dynamics breaking through the ridge over central North America will enhance developing widespread warm air advection in the wake of building surface high pressure across the eastern United States.\n\nA strengthening cold front will move off the East Coast within 24 hours, maintaining winter conditions, especially over New York and New England, where the strongest cold air advection is expected. A cold blast will also extend farther southwest over the eastern United States.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "42b47c54cebcf21f", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42414:42418:1", "date": "1988-01-13 07:13:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42416:42420:1'} The data starts from January 13 00:00 and ends on January 13 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A dry pattern is in store for most of the eastern half of the nation as a large surface ridge dominates behind the front now approaching the East Coast. Only some lingering lake effect snows are expected beyond tonight. There is a possibility of a few showers along the Texas Gulf Coast at 48 hours, with moisture beginning to return and a shortwave in the southern stream approaching from the west.\n\nThe west will experience increased onshore flow throughout the period along the coast. The frontal system associated with the first wave will be approaching the northwest coast tonight and is forecast to dissipate as it crosses the mountains. The second wave and associated surface features appear strong enough to make it across the mountains intact. The west is expected to remain rather wet with the onshore flow and available dynamics.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "608a8f041f2b67e1", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42416:42420:1", "date": "1988-01-13 19:11:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42418:42422:1'} The data starts from January 13 12:00 and ends on January 14 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A deepening cyclone near 145W and an associated Pacific weather front just east of 135W are on schedule, with the front expected to come ashore by 18Z and a deep low headed for Queen Charlotte Island. A powerful upper-level jet core shifts eastward to about 150W in 48 hours, with associated dynamics at lower levels likely to suppress the front to lower California.\n\nThe strength of upper dynamics and onshore flow with the main system is likely to generate the greatest areal coverage of precipitation of recent events. A surge of mild maritime air pushes the rain-snow line well inland. Strongest upper dynamics are headed across southwestern Canada with subsequent falling 500 heights likely to induce a deepening surface low over central Alberta.\n\nA much subdued maritime front will have pushed to the northern Plains, Four Corners, and southern California positions. Elsewhere, some moderation over central US is expected with another cold blast across much of the eastern US.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "602349c5a334c288", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42418:42422:1", "date": "1988-01-14 07:08:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42420:42424:1'} The data starts from January 14 00:00 and ends on January 14 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A frontal system is approaching the West Coast. Energy with the accompanying upper dynamics is forecast to split, with a portion heading into southwestern Canada while the southern wave tracks across northern California and the central Rockies. A broad upper trough will eventually cover the western and central U.S., while ridging and warm advection will move over the eastern U.S. The final trough is expected in the vicinity of 145W at 48 hours.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "eab976b8cef979b1", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42420:42424:1", "date": "1988-01-14 19:12:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42422:42426:1'} The data starts from January 14 12:00 and ends on January 15 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A train of short waves in the eastern Pacific is forecast to push eastward, knocking down the upper ridge over the Rockies and developing zonal flow across the western and central U.S. over the next 48 hours. The jet will sink southward to southern California and through the southern Rockies. An abundance of moisture is forecast to spread across the entire western U.S., and this combined with rapidly moving disturbances should spread broken to scattered precipitation from the Pacific Coast to the eastern slopes of the Rockies. Precipitation should be in the form of snow from the Cascades and Sierra Range eastward, while rain is expected along the Pacific Coast.\n\nDuring the second 24-hour period, moisture from the Gulf of Mexico should stream northward through the Mississippi Valley, permitting rain to spread along eastern Texas and the lower Mississippi Valley, then northward along a frontal boundary. Along the northern tier states, snow is expected to spread across the region as a short wave moves through the northern Rockies to the upper Mississippi Valley. Most precipitation is likely to remain north of the border in the vicinity of a surface low. The surface low forecast to move through southern Canada is expected to draw down a new surge of arctic air; however, this should not enter the northern U.S. until after 48 hours.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "b1de5f41eb6fcbbc", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42422:42426:1", "date": "1988-01-15 07:06:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42424:42428:1'} The data starts from January 15 00:00 and ends on January 15 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Multiple shortwaves in fast zonal flow in the Pacific are forecast to continue, with the pattern evolving to a broad upper trough covering much of the western and central U.S. The main frontal system will continue tracking across the Rockies and northern Plains. Precipitation will increase along and ahead of this front as Gulf moisture interacts with dynamics from a wave in the southern stream near southern Baja this morning.\n\nA stronger wave will be approaching the northern California coast on day 2, with uncertainty in the strength of the associated surface low.\n\nThe week will remain quiet along the East Coast after tonight as the wave which brought a snowstorm to the Carolinas moves into the Atlantic. A persistent surface ridge will likely keep temperatures from warming quickly.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "a6ef1d8adbd4abdf", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42424:42428:1", "date": "1988-01-15 19:13:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42426:42430:1'} The data starts from January 15 12:00 and ends on January 16 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Systems just off the Washington coast should push northeastward into the Pacific Northwest and British Columbia very early in the period, bringing the first round of broken precipitation. Another weak shortwave just west of 140 will spread the next round of broken precipitation into the West Coast later in day 1 as fast flow across the Pacific continues. The final and strongest shortwave of the group should reach the western United States on day 2, accompanied by a decent frontal system and the last batch of enhanced precipitation.\n\nIn the East, return flow around retreating surface high and southwesterly upper flow indicate that an expanding warm advection rainfall pattern will develop, starting in the southern Plains and lower Mississippi Valley on day 1 and reaching the eastern Great Lakes, Ohio Valley, and southeastern states on day 2. The front and rainfall will be slower in their eastward progress.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "9f853faef19a26ba", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42426:42430:1", "date": "1988-01-16 07:15:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42428:42432:1'} The data starts from January 16 00:00 and ends on January 16 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A trough is well located near 150W and will become the next major storm for the southwestern U.S. An impressive jet is driving this system, increasing its strength. Heavy precipitation is already occurring near the Texas and Louisiana coastal region as a warm advection pattern is aided by a shortwave. Widespread broken precipitation is expected to spread along and ahead of the cold front in the Plains. This front should weaken and slow down as it encounters persistent surface ridging in the East. The surface pattern indicates neither excessive ridge movement nor excessive system filling.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "ea9d848ed669ae6e", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42428:42432:1", "date": "1988-01-16 19:11:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42430:42434:1'} The data starts from January 16 12:00 and ends on January 17 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A strong and developing shortwave is about to impact the central California coast and is forecast to continue moving rapidly east-southeastward, setting up a major trough over the southern Rockies by the end of the period. This will result in significant precipitation for central and southern California on day 1, with activity shifting into the southern Rockies and southern High Plains by the end of the period. The eastern U.S. will experience a stalled approaching cold front due to a southwesterly upper flow, allowing milder air to reach the East Coast and maintaining occasional wet conditions over much of the eastern third of the nation.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "5c8a62042d70a25e", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42430:42434:1", "date": "1988-01-17 07:12:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42432:42436:1'} The data starts from January 17 00:00 and ends on January 17 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A strong upper level trough is moving toward the southwestern U.S. This storm is currently bringing heavy rainfall to southern California coastal sections, with heavy snow likely over the Sierras. As the storm continues southeastward, widespread snow will spread tonight to the higher terrain of Utah, Arizona, and New Mexico, as well as to the Colorado Rockies. Snow will increase over northern New Mexico and Colorado by day 2 as low level easterly flow develops.\n\nMeanwhile, much of the eastern U.S. is also experiencing active weather as warm advection continues along with the passage of a shortwave. This feature is forecast to move to the Ohio Valley on day 1 and on to New England on day 2.\n\nA portion of the southwestern trough is expected to lift out, with varying positions of the main surface low.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "15610e2d9041f9ca", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42432:42436:1", "date": "1988-01-17 19:11:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42434:42438:1'} The data starts from January 17 12:00 and ends on January 18 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A vigorous upper low and associated short wave off the southern California coast is forecast to move east-northeast along the southern Rockies to the central Plains over the next 48 hours. A major storm should spread a swath of snow and rain from the southern California coast eastward through the Intermountain region and southern Rockies to the entire Mississippi Valley, Ohio Valley, and Mid-Atlantic states. A new cold front is forecast to push southward through eastern Canada to the southern Mid-Atlantic states as a backdoor cold front. Precipitation associated with this boundary is likely to be scattered over New England during day 1. Preceding this cold front is a short wave from Missouri, which is forecast to move through the southern Great Lakes and off the New England coast, spreading an area of broken rain along the associated surface trough. Back west, a series of short waves should be forced into western Canada as an upper ridge builds along the west coast.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "077a11c95722525c", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42434:42438:1", "date": "1988-01-18 07:19:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42436:42440:1'} The data starts from January 18 00:00 and ends on January 18 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A major portion of the southwestern upper trough will lift northeast toward the southern Great Lakes region by 48 hours. The jet is forecast to move from Texas across the southeastern U.S. to the southern Appalachians. Widespread precipitation will continue ahead of the system with the aid of warm advection in southerly low-level flow. The pattern suggests continued precipitation, but amounts beyond 24 hours may be overestimated.\n\nIngredients are coming together for a significant severe weather episode as strong vorticity lobes are forecast to move through the main trough. The main threat will be over eastern Texas, Arkansas, and Louisiana on day 1 and move eastward to Mississippi and Alabama on day 2.\n\nAs the main frontal system continues eastward, high pressure will build southward and enhance precipitation in New Mexico and Colorado with low-level upslope flow. Low-level easterly winds should also help lingering snow showers in the area on day 2.\n\nIn the West, a building upper ridge will keep the weather quiet for a while, but a strong wave with associated precipitation will affect the northwest coast at 36 hours and beyond.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "b4aea6e93904823a", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42436:42440:1", "date": "1988-01-18 19:11:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42438:42442:1'} The data starts from January 18 12:00 and ends on January 19 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A big storm is lifting out of the Southern Plains, with an amplifying system expected to hit the Northwest Coast during day 2. Reformation of a Southern Plains low is expected early in day 1 in response to a strong shortwave rounding the base of the trough. Widespread overrunning rainfall will precede the storm through day 2, with active convection likely along the trailing cold front in the Southern States on day 1, diminishing on day 2 in the Southeast as the best upper dynamics lift north-northeastward away from the front. A major snowstorm is likely to the left of the storm track, enhanced by a lifting out upper low. A shortwave initially near 160W should reach the West Coast early in day 2. Decent rainfall should reach the West Coast during day 2, with snow stretching into the Northern Rockies by the end of the period.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "142e64da4dc3593a", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42438:42442:1", "date": "1988-01-19 07:14:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42440:42444:1'} The data starts from January 19 00:00 and ends on January 19 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: An upper low lifting northeast from the Plains will allow a surface low to reform and move northeast through the Great Lakes. Widespread overnight rain and snow will continue associated with this system into Wednesday. A trailing band of snow showers will extend southwest under the upper trough through the Great Lakes into the Plains after the main low passes. Convection in the southeastern U.S. should ease Wednesday as Gulf inflow and low-level convergence weaken.\n\nThe next system of concern is a vigorous disturbance near 48N 155W, which will break through the mean West Coast ridge and plunge into Alberta or northern Montana within 48 hours. This should produce a good chance of snow for Idaho, Montana, and North Dakota Wednesday night and Thursday. Confidence is fairly high that this will be a strong storm.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "d1676853c1a7cade", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42440:42444:1", "date": "1988-01-19 18:58:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42442:42446:1'} The data starts from January 19 12:00 and ends on January 20 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A short wave associated with an upper trough is forecast to move through British Columbia and Alberta to southern Saskatchewan while dragging a cold front southward through the Intermountain region to southern Colorado and the central Plains. Most precipitation is expected to remain north of the border and near the vicinity of the vorticity maximum, with scattered snow showers accompanying the cold front. An intense storm in the central Plains is forecast to lift northeastward and weaken slightly as the upper low dissipates and moves as an open wave. A dry slot is moving through the Ohio Valley and is forecast to push eastward into New England, sparing that area from the brunt of the storm. Significant precipitation is likely to occur through the upper Mississippi Valley and Great Lakes near the weakening upper low, and over the southeastern U.S. in the vicinity of a slow moving cold front.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "860299584fb3a730", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42442:42446:1", "date": "1988-01-20 07:26:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42444:42448:1'} The data starts from January 20 00:00 and ends on January 20 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: The most recent winter storm is exiting northeastward from the Great Lakes. In this region, lingering troughiness and moisture should bring a slow end to the snow, including lake effect snow.\n\nFarther south, a turn to more anticyclonic flow over the Gulf suggests that one more short wave may bring a day 2 frontal wave in the Atlantic and a slower end to the southeastern coastal precipitation.\n\nIn the far west, the next short wave topping the western ridge over British Columbia is strong and is expected to move southeastward into the northern Plains within 48 hours. The track of this system should allow it to tap some Arctic air, but not as severe as in recent weeks.\n\nA strong high in the west should keep the West and Plains cold.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "9d50b9f258daf8ec", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42444:42448:1", "date": "1988-01-20 19:09:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42446:42450:1'} The data starts from January 20 12:00 and ends on January 21 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: High amplitude flow will continue over the U.S. during the next 48 hours. Rapid building of a ridge in the Gulf of Alaska is expected in the next 24 hours, followed by flattening of the ridge as a powerful jet targets the British Columbia coast. An associated Pacific frontal system should cross the Pacific Northwest on day 2, with rain spreading over Washington and Oregon and snow inland over the extreme northern Rockies. A cold front in the northwest U.S. is expected to push rapidly into the Plains states behind northwest flow aloft, weakening as upper support splits with main energy diving toward the southern Rockies. The southern Rockies system should produce some light snow across portions of New Mexico on day 2 despite relatively low relative humidity. A secondary surge of arctic air should spill into the central and northern Plains eastward into the Mississippi Valley, accompanied by light snow in northern portions near best upper support. In the East, one more short wave is expected to move intact across the Southeast, inducing cyclogenesis off the South Carolina coast. A well-defined vortex center over Oklahoma continues to drop southeastward. Precipitation in the Southeast is expected to linger.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "4015603f81ea4744", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42446:42450:1", "date": "1988-01-21 07:06:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42448:42452:1'} The data starts from January 21 00:00 and ends on January 21 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: The blocking pattern should continue, but the intrusion of the strong Pacific jet stream will modify its amplitude. Breakdown of the southwestern Atlantic ridge will allow the slow-moving cold front in the East to move south through Florida within 24 hours, aided by a developing coastal low. A strong shearing flow aloft will keep this system weak, but there will be rain along the southeastern coast. The short wave moving from the Canadian Rockies will bring a return of Arctic air to northern areas. With the polar vortex far north, the system will track mostly eastward, with Arctic air only filtering southward. Much of the central and western US will remain chilly with cold air already in place. In the far West, relaxation of the Pacific ridge and a strong push of westerlies will bring frontal systems inland, with the next system arriving early on day 2. Sustained overrunning in the northwestern US is unlikely, so precipitation in that area will be reduced on day 2.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "38dcd6d713ab4ee6", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42448:42452:1", "date": "1988-01-21 19:09:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42450:42454:1'} The data starts from January 21 12:00 and ends on January 22 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A strong short wave is expected to impact the Northwest coast early in the period. An associated frontal system is expected to move southeastward across the northwest tier of states, bringing rain along coastal sections of Washington and Oregon and inland snow from the northern Intermountain region into the central and northern Plains. The upper ridge near 120W is forecast to reload rapidly near 135W while the short wave moves southeastward toward the southern Plains. This should begin to move at least a portion of the energy from a cutoff low currently dropping southward from New Mexico and allow overrunning precipitation to move northward along the western Gulf Coast within 48 hours. A stronger impulse is expected to drop southeastward into the southern Plains. A weak arctic front dropping southeastward from Canada should bring some light snow from the northern Plains into the Great Lakes and New England by the end of the period. High pressure building in behind the exiting cold front in the Southeast should allow for dry weather and seasonable temperatures from the Tennessee Valley eastward.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "74816c0656457366", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42450:42454:1", "date": "1988-01-22 07:02:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42452:42456:1'} The data starts from January 22 00:00 and ends on January 22 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A weak to moderate storm is expected to move across the northern Plains and into the western Great Lakes by 48 hours. The frontal system moving eastward across the Great Lakes is weak and is expected to continue weakening as it drifts eastward. In southern Texas, overrunning is expected to cause most of the rain.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "1fe7bce9523cd6a6", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42452:42456:1", "date": "1988-01-22 19:07:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42454:42458:1'} The data starts from January 22 12:00 and ends on January 23 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A deeper low will develop over the northern Plains, weakening through the Great Lakes on day 2. There will be slower eastward movement with an associated front into the East and a weak surface wave over the Southeast states. Remnants of a cutoff low over northern Mexico are forecast to move east into the Gulf of Mexico, which will likely increase precipitation potential in the Southeast by 48 hours. In the West, with an upper ridge anchored along the coast, dry northwest flow and seasonably cool temperatures will prevail from the Rockies westward. Widespread snow is expected to spread across the northern Plains and northern Mississippi Valley eastward into the Great Lakes and western portions of New England by the end of the period.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "824b5bfba22cac15", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42454:42458:1", "date": "1988-01-23 06:57:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42456:42460:1'} The data starts from January 23 00:00 and ends on January 23 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: The strong short wave over the Dakotas is expected to dominate the weather pattern across the Plains and Great Lakes, leading to a deeper surface system and more extensive precipitation through the first day of the forecast. After this period, most of the short wave energy will move quickly southward toward the Gulf in fast northerly flow, shifting the weather focus to the Gulf region for possible development of a surface low during the second day of the forecast. Another short wave is expected to bring another shot of arctic air into the central US within 48 hours. In the West, weather will be dominated by a strong basin high.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "a09aa3ae7b93f261", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42456:42460:1", "date": "1988-01-23 19:11:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42458:42462:1'} The data starts from January 23 12:00 and ends on January 24 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Deep surface low over the mid Mississippi Valley is now lifting and weakening as a short wave is pushed out by the western extension of the polar vortex dropping southward from western James Bay. Widespread snow should gradually decrease across the Great Lakes and upper Ohio Valley, but a second surge of light snow is expected on day 2 across the western Lakes and upper Mississippi Valley as the polar vortex and a new arctic surge drop rapidly southward. In the south, strong short wave energy is dropping southeastward through the central Rockies. With heights already quite low across Oklahoma and Texas and the system still developing, a much weaker system is expected to track across the Gulf Coast states over the next 24 hours. Strong wave development on the cold front through the southeast by the end of the period is expected. Strong baroclinicity and dynamics with this system, including possible phasing with the northern stream polar vortex after 48 hours, imply a significant storm and precipitation event across the southeast and mid-Atlantic states. In the west, a strong upper ridge should hold firm, so expect light, if any, precipitation with the frontal system as it moves through the Pacific Northwest on day 2.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "bf10ad2f168bdb43", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42458:42462:1", "date": "1988-01-24 06:54:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42460:42464:1'} The data starts from January 24 00:00 and ends on January 24 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A major winter storm is expected to develop along the eastern seaboard during the next two days. There will be strong cold advection and near perfect positioning of the strong jet stream, resulting in a deep central pressure at 48 hours. Moisture will be abundant during all phases of development, leading to the potential for convection along the Gulf Coast and significant snow from the North Carolina mountains northeastward. The rain/snow line is expected to straddle all of the major northeastern cities. An upper low is expected to begin closing off at 48 hours, setting the stage for a major snowfall across inland areas of the northeastern US from 48 hours onward. Farther west, strong northerly flow from Canada is driving a powerful arctic front southward across the Plains, with the very cold air expected to reach all the way into the Gulf of Mexico by 48 hours. This is expected to be the last arctic blast in this cycle.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "fef7db4630b3ba92", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42460:42464:1", "date": "1988-01-24 19:07:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42462:42466:1'} The data starts from January 24 12:00 and ends on January 25 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A significant winter storm is expected for the Middle Atlantic States into New England. Rapid deepening of the surface low is forecast as it moves up the East Coast. Moderate to heavy snow is expected from portions of western North Carolina northeastward along and west of the I-95 corridor. Lagging vorticity through the lower Mississippi Valley should help prolong lighter snowfall once the main precipitation passes.\n\nTo the south, a trailing cold front should sweep through Florida accompanied by showers and thunderstorms. A strong arctic surge currently through the central Plains will move rapidly through the Deep South early in the period.\n\nIn the West, a weak impulse will drag a weak cold front across the extreme northern tier of the U.S. over the next 48 hours with minimal precipitation.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "e4203e321da6656f", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42462:42466:1", "date": "1988-01-25 06:58:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42464:42468:1'} The data starts from January 25 00:00 and ends on January 25 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A slow progressive pattern aloft will dominate from coast to coast over the next 48 hours, with an upper ridge over the western states keeping the region cold and dry except for some cloudiness near the mean upper jet position. Any precipitation will remain well to the north over western Canada along a stationary frontal zone.\n\nA complex shortwave over the Canadian Rockies will move over the ridge and dig into the eastern trough, causing a strong shortwave to move over the lower Mississippi Valley this morning. This will generate cyclogenesis from the coastal Carolinas northward, with the lead frontal wave near Wilmington, NC to Cape Hatteras expected to become the primary surface low. A strong jet core aloft will lead to deepening cyclogenesis northeastward to just east of Boston in 24 hours. There will be a snowstorm of moderate size and intensity from the Mid-Atlantic region north-northeastward along the spine of the Appalachians eastward to the rain-snow line over the coastal plain. The forecast rain-snow line should spare major East Coast cities from significant snow, but interior sections of New York and New England may experience heavier snowfall as the storm deepens off the New England coast. The fast movement of the developing system will help limit impacts.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "c87b5985685f5a6d", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42464:42468:1", "date": "1988-01-25 19:01:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42466:42470:1'} The data starts from January 25 12:00 and ends on January 26 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A persistent high amplitude ridge along the West Coast is being pushed eastward by a developing storm system near 39N/152W. Moisture ahead of this system, associated with a weak short wave trough near 35N/135W, will be carried in southwest flow, spreading scattered showers along the northern Pacific Coast by 36 hours. An approaching cold front associated with the developing Pacific low is expected to bring more significant precipitation to the northern Pacific Coast by 48 hours.\n\nA rapidly deepening winter storm off the Delmarva Coast will continue moving quickly up the coast on day 1 under a strong southerly jet, bringing moderate to heavy snow over interior portions of New York through New England and rain along the coast.\n\nOver the southern Great Lakes, a closed polar low over Illinois and Indiana is forecast to open up and begin lifting toward the east-northeast later in the period, but not before producing some locally heavy snows early on across northern sections of Ohio into northwest Pennsylvania.\n\nInstability associated with frigid cold air behind the arctic front should continue to produce scattered snow showers from the Ohio Valley eastward to the Mid-Atlantic Coast on day 1, with conditions improving on day 2 as cyclonic flow relaxes.\n\nHigh pressure over the remainder of the country should keep conditions cold but dry, except for the northern Plains where some light snow is possible on day 1 ahead of a warm front.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "862e376cca5fadfa", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42466:42470:1", "date": "1988-01-26 07:07:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42468:42472:1'} The data starts from January 26 00:00 and ends on January 26 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A twin-centered upper trough along 145W will translate eastward slowly, mainly due to an upper low near 40N, 150W. The mean ridge over the far western states will deflect the upper low east-northeastward with some weakening. The northern portion of the upper trough will become nearly stationary over southeastern Alaska. A Pacific weather front will push over the northern Great Basin to central California within 48 hours but will be substantially weakened, with most precipitation confined to coastal and Cascade areas of Washington, Oregon, and northern California as upper support moves northeast along the coast. Once the upper ridge line reaches the Canadian-US divide, moderately strong surface baroclinicity will develop over southwestern Canada as another building Arctic air mass and Pacific maritime air collide over the region. Elsewhere, a dry, weak stationary boundary will extend southeastward over the Plains states under continued strong northwesterly flow aloft.\n\nEast of that boundary to the East Coast, cold Arctic-like air will become well entrenched under a deep upper trough. The thrust of the cold air mass will move across the lower Appalachians and Mid-Atlantic areas northward, with even northern Florida receiving a glancing blow over the next two days as polar air dips over southern Alabama, Georgia, and northern Florida. The only precipitation will be lingering lake-effect snows.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "59a3f2df9b77f7f9", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42468:42472:1", "date": "1988-01-26 19:00:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42470:42474:1'} The data starts from January 26 12:00 and ends on January 27 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: High surface pressure from coast to coast should keep most of the country cold and dry through the next two days. The exception is the far West, where much of the energy from the large eastern Pacific trough will drift onshore during day 2, squeezed eastward by a digging Gulf of Alaska vortex and fringe effects from the Pacific jet. Best precipitation should be limited from the Cascades westward before jumping to the northern Rockies at 48 hours. The Arctic airmass in Alaska should settle southward only as fast as the upper pattern digs, since it will be fighting a ridging pattern in the westerlies. East of the Rockies, this should allow downslope-induced warmer air to work eastward as a warm front, teaming up with some moderating air from the southwestern US. In the central and eastern US, it will remain cold as another shot of Arctic air filters southeastward.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "937c33fe26c00943", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42470:42474:1", "date": "1988-01-27 07:06:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42472:42476:1'} The data starts from January 27 00:00 and ends on January 27 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A near zonal pattern is expected to develop by 48 hours as the upper ridge over the Pacific Coast states moves northward to the central US, somewhat suppressed by a new polar vortex dropping to Hudson Bay. A barotropic low near 40N, 140W continues to fill northeastward, causing some height falls southward over the West Coast. This allows the southeastern Alaska vortex to slide south-southeastward along the Alaska-British Columbia coast, maintaining low pressure over British Columbia and frontogenesis southwestward to off the Washington-Oregon coast. The path of upper dynamics should generate broken precipitation over coastal sections and the Cascade Range, diminishing to scattered inland as upper dynamics are dampened by the developing pattern aloft over Canada.\n\nThe Hudson Bay to Alaska-British Columbia upper trough connection will draw southeastward another cold, building high from the Arctic region of Alaska-Yukon, originating from far eastern Siberia. For now, the lower 48 states will be spared the Arctic onslaught due to the developing zonal pattern. Associated frontal precipitation should remain along and north of the front where low-level flow and thermal gradient are most favorable. Elsewhere, dry conditions are expected, with the East remaining unseasonably cold through 48 hours and the central US continuing to warm considerably as the recent strong upper trough exits off the East Coast.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "7671fe6250a60b86", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42472:42476:1", "date": "1988-01-27 19:00:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42474:42478:1'} The data starts from January 27 12:00 and ends on January 28 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A return to zonal flow is expected as the mean pattern becomes more progressive and the Pacific westerlies move through. Farther north, two centers of the polar vortex are expected to slowly move southward, which should suppress wave action in the westerlies and bring the return of Arctic air closer to the northern states. However, interaction between these lows and a generally west-southwesterly flow over the US will slow the arrival of cold air. Meanwhile, large high pressure cells in the east should continue to drift eastward and offshore within 48 hours. In the region of rising heights and zonal flow, this indicates a warming trend and continued dry weather for most of the country east of the Rockies. In the west, the progressive pattern and intrusion of the westerlies should slowly erode the basin high and allow much of the interior west to warm up. These same westerlies will also push Pacific systems inland, with the first currently off the northwestern coast. However, the main Pacific moisture is expected to be directed into Canada, limiting significant precipitation to the northern mountains and areas west of the Cascades.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "fa55c8fc8316759c", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42474:42478:1", "date": "1988-01-28 07:14:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42476:42480:1'} The data starts from January 28 00:00 and ends on January 28 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: The pattern is expected to become zonal aloft, sparing the lower 48 states from any Arctic outbreaks. A weakening Pacific weather system along the West Coast will continue to weaken as an upper ridge amplifies northward across the eastern Pacific and Alaska. This allows some dynamics to move south-southeast on the east side, while a shortwave moves from southeastern Alaska to southern British Columbia. The polar vortex over Hudson Bay dominates circulation and suppresses ridging over the western states, further weakening the Pacific system. Associated precipitation is likely to diminish further over inland areas.\n\nThe evolving pattern over Canada will allow Arctic high pressure over the Yukon to move slowly east-southeastward, with the Arctic boundary moving toward the vicinity of the US-Canadian border, intruding into the Dakotas, Minnesota, and western Great Lakes region. Any associated precipitation should remain along and north of the front where dynamics and low-level flow will be more favorable.\n\nElsewhere, especially over the eastern states, a warming trend will be evident as the upper trough exits rapidly off the East Coast.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "b820eb1193c24141", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42476:42480:1", "date": "1988-01-28 19:05:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42478:42482:1'} The data starts from January 28 12:00 and ends on January 29 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A ridge building in the east central Pacific will continue to lower heights in the western US, resulting in a broad mean trough by 48 hours. This will allow a portion of the polar vortex to move southwest toward the northern Rockies by that time. Some phasing between this system and its stronger parent low over Hudson Bay should slow the advance of arctic air, especially west of the Divide. The shift to a trough in the west will break down the persistent Great Basin high.\n\nThe best of the Pacific moisture inflow is already inland, so further western precipitation should be scattered and light, except in mountain areas. Farther east, this pattern will induce a low-level trough in the lee of the Rockies, strong enough to become a weak cold front by 36 hours as the height falls spread eastward. Initially, temperature contrast will be minimal, but this boundary will eventually mark the leading edge of colder air as arctic air moves southward from 48 hours on. Minimal Gulf inflow suggests only scattered precipitation on day 2 in the central US ahead of this front.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "19a9c0022c662509", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42478:42482:1", "date": "1988-01-29 07:13:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42480:42484:1'} The data starts from January 29 00:00 and ends on January 29 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: An upper ridge amplifies over the eastern Pacific northward across Alaska through 48 hours. Wave energy drives southward from the Arctic region while moving along the British Columbia upper trough. By 48 hours, a position near Saskatchewan-eastern Montana is expected. The upper ridge holds a shortwave off California on an easterly course ahead of the British Columbia trough. A broad, rather flat ridge over the central US is forced off the East Coast by 48 hours, with an extensive major trough covering most of the continent.\n\nThis scenario allows an Arctic boundary to sink southwest over Washington to the Continental Divide and deep into the central Plains. The Plains surface trough undergoes frontogenesis from falling heights aloft and subsequent thickness packing east of the Rockies.\n\nThe British Columbia trough should generate some back-range snows mainly post-frontal, with some scattered snow between the low-level trough-ridge axis to the lee of the Rockies due to upslope flow.\n\nLate in the period, as the frontal wave nears the western Great Lakes and Gulf moisture moves northward, an increase in precipitation along the cold front and north of the surface low over the cold air mass is expected, aided by increased surface baroclinicity and upper support over the region.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "8c4d9c3468c7b322", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42480:42484:1", "date": "1988-01-29 19:04:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42482:42486:1'} The data starts from January 29 12:00 and ends on January 30 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A ridge building in the eastern Pacific will expand during the next two days, aiding in the development of a large trough over the western two-thirds of the country by 48 hours. As this pattern unfolds, a short wave over British Columbia will move southward and then eastward. This system will slow the southward push of arctic air east of the Divide, while allowing some cold air to spill into the northwestern US. At the same time, Pacific inflow will shut down, resulting in drying in the far West. East of the Rockies, lowering heights will use the remaining Pacific moisture, with the best chance of snow behind the arctic boundary in the Rockies and upslope areas to the east, including the environs of Alberta. Downstream, Gulf inflow will remain weak due to lingering surface ridging across the Gulf, and the lack of a dominating short wave will keep precipitation scattered across the central US. In the East, a warming trend is expected.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "830ef243092fa7da", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42482:42486:1", "date": "1988-01-30 07:18:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42484:42488:1'} The data starts from January 30 00:00 and ends on January 30 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A high amplitude blocking ridge is present in the eastern Pacific, with a large broad trough settling over the western and central U.S., and remnants of a strong upper ridge in the East. An Alberta shortwave will maintain light snow across much of southern Canada as it moves east-southeast, while also pulling Arctic air into the Pacific Northwest early in the period. Arctic air will move southward down the High Plains and eastern Rockies, with at least scattered snow likely behind the front throughout the period, supported by easterly low-level upslope flow. The front remains well defined against the Rockies even at 48 hours. The main difference in the forecast is the speed of the cold front pushing through the south-central states, especially on day 2. Strong low-level south-southwesterly flow off the Gulf will support an expanding area of rainfall ahead of the front, beginning in the central U.S. on day 1 and reaching the Ohio Valley and Great Lakes on day 2. A long-awaited warming trend will dominate much of the eastern U.S. for the duration.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "d93fc345908f3b27", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42484:42488:1", "date": "1988-01-30 19:06:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42486:42490:1'} The data starts from January 30 12:00 and ends on January 31 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Arctic air is moving southward into the Plains as a short wave moves east of the Rockies. The arctic boundary will remain intact through most of Day 1, then will strengthen the slow-moving polar front in the southern Plains. Even with the arctic air behind it, the cold front will move eastward slowly because it is nearly parallel to the flow at most levels. Prefontal precipitation will be slow to move eastward. On Day 2, a short wave crossing the Plains will pass over the arctic air, making it difficult to bring along significant moisture. Strong southwesterly flow ahead of this system will prevent frontal moisture from moving westward. The slow-moving and wavy nature of the front and southwesterly flow aloft support some postfrontal overrunning in the Ohio Valley and eastern Great Lakes at that time.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "755b57a99cb42d33", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42486:42490:1", "date": "1988-01-31 07:13:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42488:42492:1'} The data starts from January 31 00:00 and ends on January 31 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A slow-moving surface front is expected through the East and South, with increasing moisture and instability streaming north-northeast ahead of the front. An expanding area of broken precipitation will accompany the front, with scattered rainfall likely in the warm air well in advance of the front due to high moisture and instability. An overrunning event, mostly snow, is likely beginning early on Day 2 across the mid to upper Mississippi Valley and into the Great Lakes, in response to a system moving into the central Rockies by Monday morning and into the western Lakes region by Tuesday morning. Snow is expected to continue much of the period in the northern and central Rockies due to overrunning very cold Arctic air combined with low-level upslope flow.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "5a62b5cbcf5ba6aa", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42488:42492:1", "date": "1988-01-31 19:08:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42490:42494:1'} The data starts from January 31 12:00 and ends on February 01 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: One of the coldest Arctic outbreaks of the winter is sliding southward along both sides of the Divide. As this air drives southward through the Plains, it should moderate somewhat due to southwesterly flow aloft. The ridge in the Pacific is expected to hold strong and extend back into Siberia. The pattern should continue delivering Arctic air southward, with the next cold blast in this series approaching the northwest within 48 hours. As a consequence, Pacific westerlies are forced to undercut the ridge and direct Pacific systems inland at southern latitudes. The first of these systems is moving steadily eastward and should affect the southwestern US during Day 2. Farther east, the Arctic plunge should push the slow-moving cold front in the central US, but the mild air in the East should only retreat slowly due to the strong southwesterly flow aloft. Gulf inflow is improving, supporting overrunning precipitation. The best precipitation should occur with and ahead of the front and back to the marked airmass contrast.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "7566a32e445cb760", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42490:42494:1", "date": "1988-02-01 07:16:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42492:42496:1'} The data starts from February 01 00:00 and ends on February 01 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: An arctic air mass is presently dropping southward through the Central Plains and northern Rockies and is forecast to gradually move southeastward through the Ohio Valley and New England to the Mid-Atlantic states over the next 48 hours. Each short wave rotating around the polar vortex is expected to lower heights over the eastern half of the U.S., allowing a cold front to sink southward, though slowly, through the Ohio-Tennessee Valleys. With the arctic high moving northeast to eastern Canada, a backdoor cold front should move southward more rapidly through New England to the Mid-Atlantic states, reaching North Carolina by 48 hours. The air mass should be shallow along the eastern slopes of the Appalachians since the mid-upper level flow is southwesterly and the real cold air is well behind the frontal boundary. A swath of overrunning precipitation is forecast to spread from the Mississippi Valley eastward through the Great Lakes and New England to the Mid-Atlantic states. Convection is likely along and ahead of the cold front as it crosses the southern tier states over the next 2 days. Further north, a new surge of arctic air is forecast to push through the Pacific Northwest and northern Rockies to the northern Plains as a short wave drops southward from the Northwest Territory to southern British Columbia. This system should spread snow across the Pacific Northwest coast to the northern Rockies, while snow is also likely to accompany a weak surface low moving through southern Canada. A short wave near 130W is forecast to move northeast to southern California over the next 48 hours, spreading moisture rapidly northeast through the southern Rockies to Colorado. Rain is expected along southern California and Arizona, while snow is likely through the southern plateau and Rockies.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "5a56509a916a80e3", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42492:42496:1", "date": "1988-02-01 19:02:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42494:42498:1'} The data starts from February 01 12:00 and ends on February 02 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Upper ridge remains stationary off the west coast of North America through the period, somewhat distorted over Alaska by an intense Arctic ridge-trough combination. The upper pattern over western North America is characterized by split flow. The southern stream will transport an upper trough to over Arizona and New Mexico in 48 hours. Expect scattered to broken precipitation across southern California into the Four Corners. The northern/Arctic stream will increasingly dominate as the next polar vortex settles southward over Hudson Bay, resulting in a strong upper jet from Alaska and northwestern Canada southeastward over the northern Plains. A weak Arctic boundary will sweep east and south over the north-central US with a frontal wave along the British Columbia coast southeastward to Montana and Wyoming in 48 hours. Some light snow is expected in the cold sector along and north of the jet. Over the central US, conditions will be basically dry under upper stream convergence.\n\nElsewhere, a complex vortex pattern in the southern stream over the southwest develops into several minor shortwaves, making it difficult to focus on a single feature. A wavy cold front will persist despite the strong upper flow, causing continued overrunning along and north of the front from the upper pattern and a strong cold surface ridge passing to the north over the St. Lawrence Valley, which aids the cold front in undercutting the warmer upper pattern. The strength of warming aloft should keep the rain-snow line well to the north for now.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "488bf8d6a6a6164f", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42494:42498:1", "date": "1988-02-02 06:41:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42496:42500:1'} The data starts from February 02 00:00 and ends on February 02 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Arctic high over the northern Mississippi Valley is forecast to lift northeastward to the Maritimes while dragging a moderate cold front southward and east of the Appalachians to the Georgia-South Carolina border. The southern portion of the frontal boundary is forecast to stall over the lower Mississippi Valley in the next 24 hours as heights remain relatively unchanged. A short wave off the southern California coast is forecast to move eastward through the southern Rockies to the central Plains, where it will then be absorbed by a broad upper trough over the Mississippi Valley. This impulse will generate a new surface low along the stationary boundary in the Tennessee Valley. This surface low will then move eastward to the Mid-Atlantic region and drag a new cold front through the southern tier states. The short wave off the California coast is forecast to spread rain and snow from southern California northeastward through the southern Rockies to the central Plains, then it should reestablish overrunning precipitation across the Mississippi-Ohio Valleys to the Mid-Atlantic and New England regions. Convection is likely to remain scattered across southern tier states along and ahead of stationary and cold frontal boundaries. A series of short waves are forecast to rotate around the polar vortex through British Columbia to the northern Plains. These impulses are expected to spread broken to scattered snow across the Pacific Northwest and northern Rockies in the next 48 hours.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "8b72e5372c2bf9f2", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42496:42500:1", "date": "1988-02-02 18:57:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42498:42502:1'} The data starts from February 02 12:00 and ends on February 03 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Upper ridge shifts eastward to the west coast of North America by 48 hours in response to a deep upper trough digging in upstream. This allows the Arctic jet and subsequent dynamics over Alaska and western Canada to move southeastward while digging over the mid-continent. The strongest Arctic high of the season builds slowly southeastward, nosing southward over the Plains and eastward over the Great Lakes for this period. A band of snow forms along the Arctic boundary draped over the divide from surface baroclinicity and upper jet.\n\nMeanwhile, a shortwave in the southern stream moves eastward, influenced track-wise through the period by a strong Arctic jet. Resulting broken precipitation moves eastward over the central Plains as dynamics override steady high pressure at the surface to over Texas. The shortwave induces a wave along the frontal boundary over the Texas Gulf Coast by 24 hours while moving over the lower Mississippi Valley. Strong west-southwest flow aloft and persistent surface ridge over the Gulf preclude any mass infusion of moisture into the system, but good precipitable water values en route should make up the difference. Best precipitation will be over the cold sector where overrunning and dynamics are strongest. The frontal wave should cut across the lower mid-Atlantic area before moving northeastward along the east coast as upper dynamics sharpen over the eastern states. This system may produce a moderate size snowstorm across New York and New England by the end of the period.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "0fb1e8465e718d38", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42498:42502:1", "date": "1988-02-03 07:12:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42500:42504:1'} The data starts from February 03 00:00 and ends on February 03 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A short wave is presently spreading snow across the central Plains and is forecast to weaken as it moves into the Mississippi Valley. It should then be replaced by a southern Plateau short wave, which is forecast to move rapidly northeast through the Ohio Valley and New England to the Maritimes within 48 hours. This second impulse will supply the necessary cold air to turn a stationary boundary across the western Gulf and Gulf Coastal States into a cold front. Meanwhile, a surface low associated with the short wave is forecast to move through the southern Appalachians and off the Mid-Atlantic coast, then northeast to near Sable Island. The surface low is expected to intensify once it moves over water, especially with a significant amount of cold air advecting into the system. This system should spread a swath of overrunning precipitation from the central Plains eastward to the Atlantic coast. Precipitation is expected to be in the form of snow through the Ohio Valley and New England, with rain changing to snow over the Appalachians and Mid-Atlantic as cold air moves into the regions.\n\nFurther north, pieces of an arctic high are forecast to slip southeast through the northern Rockies and northern Plains to the Mississippi Valley, as impulses rotate around the Hudson Bay cut-off. These impulses should spread scattered to broken snow from western Canada southeastward north of the stationary boundary and along the developing cold front. A mass of moisture off the Baja coast is expected to develop overrunning precipitation across southern New Mexico and southern to western Texas. With a surface ridge extending far south through central Texas, the problem of freezing rain is a serious consideration.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "d217739869cca48c", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42500:42504:1", "date": "1988-02-03 19:06:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42502:42506:1'} The data starts from February 03 12:00 and ends on February 04 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Precipitous height falls are expected over the Ohio Valley eastward to the Mid-Atlantic region and northward within 48 hours due to a series of shortwaves in the polar jet sweeping around the polar vortex over Hudson Bay. This will result in a mass infusion of arctic air over these regions.\n\nIn the wake of a rapidly developing and exiting surface low near the central Appalachians, it will turn sharply colder, with upper dynamics generating snow shower activity across the Great Lakes and Appalachians. Before this, a deepening surface low will move northeast at high speed under a strong upper-level jet over the east-central US, giving New York and most of New England a quick moderate snowstorm.\n\nAnother intense arctic shortwave is approaching near Great Slave Lake and is expected to move in within 48 hours.\n\nOver western North America, the southern stream has tapped into subtropical moisture, with an upper trough forecast to reach lower New Mexico within 48 hours. Some lead vortices will eject in advance of the main feature, eventually triggering a low-level moisture field early on over the cold sector north of a cold front settled over northern Gulf waters. Precipitation should stay along the Gulf Coast with strong cold ridge and westerly flow to the north.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "cbbeceacaa8f5925", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42502:42506:1", "date": "1988-02-04 07:09:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42504:42508:1'} The data starts from February 04 00:00 and ends on February 04 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A broad upper trough over the eastern half of the U.S. is forecast to remain intact over the next 48 hours. A series of short waves are forecast to move from the polar vortex, bringing new waves of arctic air southward through the northern Rockies to Texas and Gulf Coastal states and eastward through the Great Lakes to the East Coast. Precipitation associated with a surface low moving south of the New England coast is forecast to end in the next 12-18 hours, with snow and snow showers becoming the main weather feature after that period across the Great Lakes and western slopes of the Appalachians.\n\nA strong upper ridge over the eastern Pacific is forecast to shift eastward to eastern Washington and weaken. High pressures are expected to be maintained over the western half of the U.S., with higher pressures extending southward through Texas, bringing a colder air mass. This should allow for freezing precipitation to push farther south. Disturbances are expected to move eastward across Texas and along the Gulf Coastal states to the southeast coast over the next 48 hours. Northwesterly flow aloft is expected to suppress the precipitation shield southward and along the Gulf Coastline. Relative humidity fields suggest precipitation is likely in this area.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "9a3e0809ba31d52a", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42504:42508:1", "date": "1988-02-04 19:10:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42506:42510:1'} The data starts from February 04 12:00 and ends on February 05 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Split flow over western North America shows signs of abatement by 48 hours as an upper trough in the southern stream moves slowly east-southeastward to the upper Rio Grande while becoming somewhat flattened by the polar/arctic jet from across western Canada and northwest Canada. Developing precipitation area over most of Texas from this feature peaks and then diminishes in areal coverage to over the Rio Grande Valley by 48 hours as flow aloft becomes west-northwesterly, thereby weakening upper support. Massive cold surface high overspreads everywhere east of the Rockies, and west-northwesterly flow aloft also diminishes precipitation threat along the Gulf Coast and Florida by 48 hours, although low-level easterlies may keep Florida damp.\n\nA complex shortwave structure along 140W moves north-northeastward before moving across British Columbia, driven by a stronger upstream shortwave driving east-northeastward along 45-50N. The shortwave across British Columbia induces a leeside low over Alberta by 36 hours without phasing with the next arctic shortwave digging south from near Victoria Island of the Northwest Territories. There is a thermal distinction between the next arctic boundary and what is left of the weaker maritime front. Snow is expected near northeast Montana and the Dakotas from upper dynamics and the thermal ridge, mainly over the cold sector.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "596c89b69ba41ff0", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42506:42510:1", "date": "1988-02-05 07:12:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42508:42512:1'} The data starts from February 05 00:00 and ends on February 05 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A series of short waves in the Pacific is forecast to break down the high amplitude upper ridge over the West Coast in the next 48 hours. The first system in the series will move eastward to the Oregon-Washington Cascades and weaken, then slide southeastward to the west-central Plains. This system should spread mainly scattered rain along the Oregon-Washington coasts and snow at higher elevations.\n\nAnother short wave near 155W-160W is forecast to move northeastward to near Vancouver Island. A third and more intense system upstream is forecast to move south of the Aleutians. This latest system should help build an upper ridge near 140W-150W and amplify a downstream upper trough near 130W. The associated surface low with the short wave near Vancouver Island appears to be deep, so pressures have been scaled up.\n\nA complex of vorticity centers is forecast to rotate around the polar vortex, with a strong short wave expected to dig southward through central Canada to Lake Winnipeg. This should push a new surge of cold air southward through the northern Rockies-Plains to the upper Mississippi Valley. Most precipitation should remain north of the border, with some scattered overrunning possible ahead of a retreating warm front.\n\nDuring the next 24 hours, lake effect snows are likely to continue, then diminish during the second 24-hour period as flow shifts southwesterly on the backside of the surface ridge. Abundant moisture and weak impulses forecast to move through the base of a broad upper trough should spread rain and snow from west Texas eastward along the Gulf Coastal states to the southeast coast.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "daddbce884a647ef", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42508:42512:1", "date": "1988-02-05 19:09:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42510:42514:1'} The data starts from February 05 12:00 and ends on February 06 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A strong shortwave near 50N, 150W continues lifting out over the Gulf of Alaska, becoming blocked and weakened by a strong upper ridge northward over Alaska and the Arctic Basin. Meanwhile, a strong upper jet moves a closely following shortwave eastward through the mean ridge position over the west coast of North America to southern British Columbia in 48 hours. A surface low from the Pacific weather front is expected to propagate east-southeast under the maximum jet to southern British Columbia, then move across the divide and redevelop on the lee side over eastern Montana by 48 hours along the Arctic boundary. Most precipitation activity is expected to occur on the cold side of the stationary Arctic boundary.\n\nElsewhere, a shortwave over the Northwest Territories digs south then southeast to north of the Great Lakes in 48 hours, causing cyclogenesis from lower Alberta to southwestern Quebec, with a frontal boundary penetrating the states to just south of the Great Lakes and back west to the Montana lee side low. The best precipitation activity should be near the Great Lakes with this system, given upper dynamics and cold cyclonic advection in the low and mid levels across the remaining unfrozen portions of the lakes. Meanwhile, a complex large-scale vortex pattern within the eastern trough will progress rapidly eastward to well off the east coast, taking a portion of the cold surface high with it. The lower Rio Grande remains damp through the period as a weak upper trough over northern Mexico drifts across extreme southern Texas and the western Gulf States.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "aa84805b4e80600e", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42510:42514:1", "date": "1988-02-06 07:09:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42512:42516:1'} The data starts from February 06 00:00 and ends on February 06 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Most of the country will remain cold but dry over the next 48 hours. Upper ridge will rebuild along 130W and a broad upper trough will dominate the eastern two-thirds of the U.S. A frontal system will bring generally light precipitation into the Pacific Northwest on day 1. A surface wave will slide rapidly east-southeast through the northern Plains with attendant light overrunning snows from eastern Montana southeastward through western Iowa. Further east, a short wave dropping southeast from the Northwest Territories will drag another arctic front from the northern Plains eastward to the Mid-Atlantic coast by 48 hours, accompanied by scattered light snows with frontal passage, followed by some renewed lake effect snows over the eastern Great Lakes. A short wave trough in central Oregon appears strong enough to move a portion of the northern Mexico upper low eastward as it heads toward the southern Plains. Rain is expected along the Texas and central Gulf coasts, with inland mixed precipitation now sliding eastward on day 2, with precipitation being restricted to the central Gulf and northwest Florida coasts. Moist easterly flow and proximity to a weakening cold front off the coast should continue the risk of showers along the southeast Florida coast.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "98f80f25d2eb5de8", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42512:42516:1", "date": "1988-02-06 19:03:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42514:42518:1'} The data starts from February 06 12:00 and ends on February 07 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: As the subtropical ridge remains strong and stationary west-southwest of California, dynamic features moving through the northern Pacific are directed east-northeast toward Alaska and the British Columbia coasts. The upper low over the Gulf of Alaska weakens to the north, while a lower vortex pattern to the southeast moves through the ridge position, followed by shallow digging into the upper Mississippi Valley in 48 hours. Another arctic shortwave from the Victoria Island area pushes southward without merging with incoming Pacific systems. The combined effect of these upper dynamic features keeps the arctic boundary in place along the lower Canadian Rockies once a frontal wave moves southeast to the upper Mississippi Valley. The combination of shearing vortex and low-level easterlies over western Canada produces most snow along and north of the front.\n\nUpper dynamics and modest warm advection associated with an open frontal wave over the upper Mississippi Valley should generate some snow activity over the cold sector north of the front.\n\nA shortwave originating near Lake Winnipeg moves north of the Great Lakes to over the Maritimes, helping to drive a cold front across the northeastern United States and reinforcing cold air already covering most of the eastern US. Temperatures may moderate slightly but only minimally. More lake-effect snows are expected with this frontal passage.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "0f747d7a39ee03c5", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42514:42518:1", "date": "1988-02-07 07:10:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42516:42520:1'} The data starts from February 07 00:00 and ends on February 07 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A complex weather situation is expected across the U.S. over the next two days as three separate flow regimes affect the country. In the Pacific, several short waves will develop out ahead of a deep low near 160W and move northeast, weakening into a mean ridge position along the Pacific Coast. A Pacific front will move into the West Coast by 48 hours, with a weaker system expected. \n\nA short wave moving through the Great Lakes by 00Z will drag a reinforcing arctic front through the northeastern U.S., bringing some light snow from the Great Lakes into New England. Meanwhile, a Pacific short wave digging southeast from British Columbia will bring an associated surface low southeast along the arctic boundary into the lower Great Lakes by the end of day 2. Light snow is likely in weak overrunning of the arctic front from eastern Montana southeast into the Ohio Valley. By 48 hours, possible phasing of this system with a polar short wave dropping south from Canada may increase snowfall potential over the Great Lakes and northern Ohio Valley.\n\nFurther south, an impulse moving across the central Gulf Coast states should continue to spread mixed precipitation across the central Gulf Coast states, with snowfall possible as far south as the Florida Panhandle. By day 2, this system should begin to produce cyclogenesis along a stationary front off the southeast Florida coast and help spread rain northward along the southeast coast, with snow and sleet possible in inland sections of North Carolina and South Carolina.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "b3c0f9edc4562561", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42516:42520:1", "date": "1988-02-07 19:17:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42518:42522:1'} The data starts from February 07 12:00 and ends on February 08 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A series of short waves are forecast to move southeastward around the Hudson Bay upper low. The initial short wave is expected to move southward to the northern Great Lakes in the next 48 hours. The surface low forecast to develop off the southeast coast in the next 24 hours should move nearer to the Atlantic coastline, primarily affecting the coast of North Carolina and southeast Virginia. The Great Lakes system should spread broken snow across that region and into New England, while areas between could have some scattered snow.\n\nA train of vorticity centers is forecast to move southeastward across the northern Rockies to the central Plains. Short waves should spread broken precipitation across the Pacific Northwest and northern Rockies in the next 48 hours, with precipitation expected to be in the form of snow north of the cold front and stationary boundary in the northern Rockies.\n\nScattered to broken precipitation is likely over eastern and southern Florida as an inverted trough develops and a weak cold front moves through. Southern Texas is forecast to have scattered rain due to return flow of the surface ridge and weak vorticity centers moving through the southern stream.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "7578e4f70fbead40", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42518:42522:1", "date": "1988-02-08 07:15:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42520:42524:1'} The data starts from February 08 00:00 and ends on February 08 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A weakening frontal system near 135W is expected to move into the Northwest coast on Day 1, spreading generally light rain across much of Washington and northern Oregon. Moist onshore flow will continue the risk of precipitation into Day 2. An upper short wave will move through the mean ridge in the next 24 hours, after which tracking short wave energy becomes more complex.\n\nA weak surface wave is expected to develop along the arctic front from the northern Rockies into the central Plains by 48 hours, with overrunning snow from northern Idaho southeastward into Missouri. By 48 hours, a second, stronger impulse digging into the central Rockies and increased easterly moisture will produce an expanding area of snow across favored upslope areas of Colorado and Wyoming as a surface low develops near the Oklahoma Panhandle.\n\nA weak wave along a reinforcing arctic front in South Dakota will lift rapidly through the Northeast, dragging an associated cold front southward into Oklahoma and eastward to the mid-Atlantic coast. Generally light snows are expected from the northern Ohio Valley and Great Lakes region northeastward, with some locally heavier lake effect snows over Michigan.\n\nA low off the Southeast coast should continue to slide off to the northeast, with only light precipitation expected along the Southeast coastal plain. Over the western Gulf, a weak return of moisture around a surface ridge, aided by weak vorticity in the southern stream, should be sufficient for light rains to spread slowly northward from the Texas Gulf Coast.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "cdb1f845bbdf4c7d", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42520:42524:1", "date": "1988-02-08 19:03:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42522:42526:1'} The data starts from February 08 12:00 and ends on February 09 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A broad eastern Pacific ridge will remain in place during this period as a series of closely spaced shortwaves sweep inland over British Columbia and then shear southeastward through the central Plains. The last of several arctic highs building southeast from central Canada will reinforce a strong baroclinic zone already in place from the northern Rockies to the central Plains. This pattern favors a widespread area of light to moderate snow in the northern high Plains and northern Rockies, as upper shortwaves with moist Pacific air interact with low-level upslope flow along the arctic front.\n\nShortwave energy will move east-southeastward through the mid Mississippi Valley after 00Z/10, spreading light to moderate snow over portions of Missouri, Iowa, Illinois, and Indiana, but without significant surface development. By 48 hours, some of the energy dropping more southeastward toward the Gulf will likely result in scattered to broken rain along an inverted surface trough in the east Texas and Louisiana region.\n\nIn the East, moderate lake effect activity is likely in western New York as arctic air spills southward behind the shortwave now over Michigan. A broken area of snow is also expected to remain active ahead of this system as it tracks eastward across New England later today. Light precipitation is forecast for day 1 in the eastern Carolinas, where a slowly developing offshore wave and good easterly fetch will prevail.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "7d5a2a6393c70cf6", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42522:42526:1", "date": "1988-02-09 07:25:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42524:42528:1'} The data starts from February 09 00:00 and ends on February 09 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Arctic front dropping southward across the central states will become the focal point for much of the precipitation over the U.S. during the next 48 hours. A weak short wave trough moving eastward from the extreme northern Plains will spread mainly light snow across the Great Lakes into New England over the next 24 hours, with the exception of usually heavier lake effect snows, while the associated arctic front sweeps off the Mid Atlantic coast. \n\nUpstream, a double-barreled vortex pattern over the northwest U.S. and British Columbia is expected. A weakening surface low will move across the central Plains into the mid Mississippi Valley with light to moderate snows in weak overrunning of the arctic front. By 48 hours, the primary surface wave associated with a sharpening upper trough in the central U.S. should move from the central Rockies into the central Gulf Coast states. Increasing warm advection and influx of Gulf moisture should produce significant snows across portions of the mid Mississippi, Tennessee, and Ohio Valleys, while rain and possible thunderstorms develop ahead of the cold front in the southern Gulf Coast region. Weak upslope snows are likely to persist along the frontal boundary over the central and northern Rockies as additional vortex energy drops southeastward from western Canada. The upper ridge will keep the southwest dry but weak onshore flow will continue the risk of precipitation along the northwest coast.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "40d48c25a984a427", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42524:42528:1", "date": "1988-02-09 18:57:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42526:42530:1'} The data starts from February 09 12:00 and ends on February 10 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A weaker surface low and flatter surface pattern are expected. During the second 24-hour period, the majority of energy should move to the Mid-Atlantic coast for secondary development along the frontal boundary, which was pushed southward by an arctic high forecast to build through the Great Lakes to New England and eastern Canada. This strong arctic high will make it difficult for any surface low to develop in the cold air, forcing development toward the Atlantic coast. A series of short waves should combine with developing surface lows to spread a swath of overrunning snow from the eastern Rockies eastward to the Mid-Atlantic states and New England over the next 48 hours. Rain is expected along and behind the cold front as it moves through the southern tier states. In the west, an upper ridge is forecast to amplify and move eastward to the West Coast, forcing any precipitation into western Canada, while scattered snow is possible near the stationary boundary through the northern Rockies.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "c85ea8de4d594ee2", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42526:42530:1", "date": "1988-02-10 07:32:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42528:42532:1'} The data starts from February 10 00:00 and ends on February 10 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Developments along the eastern seaboard will require close scrutiny over the next 48 hours. Before this, western states eastward to the Divide will remain dry as Pacific weather fronts move over southwestern Canada. The extreme northern Rockies will be the exception with some scattered precipitation.\n\nA shortwave now digging in over the southern and central Plains will induce a weak frontal wave near central Tennessee in 24 hours. A strong system over British Columbia will aid in the eventual deepening of the upper trough over the eastern US by 48 hours. The deepening trough will sharpen the short ridge over New England and the Maritimes, with building and slowing of cold arctic surface high now bridging the St. Lawrence Valley and protruding southward along and east of the Appalachians. The stage will be set for a potential major snowstorm from the Mid-Atlantic region northward.\n\nA 250 mb jet core will remain across the southeastern states and then move northeast off the coast near Norfolk, based on upstream shortwaves. Coastal development is preferred. Strong easterly winds will enhance relative humidity deficiency.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "17dd52dd551a67a5", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42528:42532:1", "date": "1988-02-10 19:11:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42530:42534:1'} The data starts from February 10 12:00 and ends on February 11 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A significant surface low is expected to develop along the edge of the arctic air mass as a short wave moves through southeastern Colorado and the Texas Panhandle, rotating around a developing Great Lakes upper low. A secondary low should develop along the mid-Atlantic coast and is forecast to move along or slightly inland before consolidating with the surface low near Albany in 48 hours. This scenario leads to a major snowstorm for the Ohio Valley to New England states, especially with a negative axis at 500mb and strong low-level inflow from the Atlantic. Precipitation is expected to change to rain along the immediate New England coast as strong low-level inflow brings in warmer air. Preceding this short wave, an upper ridge is expected to build from the West Coast to the northern Rockies, forcing precipitation northward into western Canada, while some scattered snow is likely on the front side of the upper ridge and ahead of a warm front. Otherwise, the western half of the U.S. is expected to remain tranquil for the next two days.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "2fc10d9873ffb473", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42530:42534:1", "date": "1988-02-11 07:08:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42532:42536:1'} The data starts from February 11 00:00 and ends on February 11 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: The polar jet from the North Pacific across North America will remain active, driving a system eastward during the period. The associated Pacific weather front should be east of the Continental Divide, over the northern Plains, central Rockies, and weakening over central and southern California. The best precipitation is likely across Washington and northern Oregon, then eastward over the northern Rockies. The remainder of the U.S. will stay dry eastward to the Mississippi Valley under a progressive short ridge and northwesterly flow aloft, with bitterly cold conditions over the Plains early on.\n\nA major development is expected along the eastern seaboard. An intensifying secondary vortex near the lower Mississippi Valley will be driven northeastward by strong upstream wave energy originating over southwestern Canada. The jet stream should take the secondary vortex along a track with subsequent coastal development near the lower Delmarva Peninsula. Major metro areas from the Mid-Atlantic region northward will be spared any snow this time.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "7e0f7b1b9a808ac2", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42532:42536:1", "date": "1988-02-11 19:12:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42534:42538:1'} The data starts from February 11 12:00 and ends on February 12 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A major snowstorm is starting to develop in the northeastern U.S. Pressure falls are being observed along the Delmarva area. A secondary surface low is forecast to remain just inland as it moves northeastward to southern New York, where it will consolidate with a surface low moving through the Ohio Valley to produce one intense surface low. The slower progression is expected, as the 500mb low is forecast to deepen and the associated upper trough is expected to take on a negative axis. This should cause the surface low and Atlantic moisture to wrap around the upper low while the associated frontal boundary moves rapidly eastward. Consequently, the snowstorm will be slow to exit the northeastern U.S. over the next two days. There is also the possibility of snow showers lingering over the Great Lakes and western slopes of the Appalachians from residual moisture and strong cyclonic circulation from the intense surface low.\n\nA short wave near 150W is forecast to move eastward and ride the western U.S. upper ridge to eastern Montana over the next 48 hours. This should drag a cold front rapidly southeastward through the Pacific Northwest to the Plateau and northern Rockies. The initial surge of moisture from this system is forecast to spread broken rain along the Pacific Northwest coast and Idaho, then diminish to scattered snow over the northern Rockies after frontal passage. A surface low associated with this short wave is forecast to help draw down a new surge of arctic air to northern Montana by 48 hours, aided by a polar vortex forecast to drop southward from near 75N to the vicinity of 60N while ejecting a weak vorticity lobe to Saskatchewan.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "5a3ac59f2b53b683", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42534:42538:1", "date": "1988-02-12 07:08:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42536:42540:1'} The data starts from February 12 00:00 and ends on February 12 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: The northeastern winter storm is consolidating into a fast-moving coastal low, and snow will continue in New England for some time. The surface low is expected to decelerate and track just inland across New England, deepening as it moves. Significant snow is expected for interior New England, with Atlantic inflow bringing backwash snow spreading westward into the Great Lakes during Day 1 and persisting in the northeastern mountains and St. Lawrence Valley through most of Day 2.\n\nIn the West, the next short wave topping the eastern Pacific ridge is strong and is expected to bring a sizeable amount of short wave energy inland, with some shearing eastward in the northern stream and another batch digging southeastward as the eastern Pacific ridge rebuilds. There is expected to be enough energy for a double-barrelled system, with the northern portion bringing wet conditions and the southern portion attempting to reestablish some mean troughing in the southwestern US.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "f90865594d6ac8be", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42536:42540:1", "date": "1988-02-12 19:06:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42538:42542:1'} The data starts from February 12 12:00 and ends on February 13 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Current satellite trends show a coastal low off Cape Cod becoming the primary surface low. This low should continue slowly northward as the supporting negatively tilted trough becomes closed off over New England. Significant snowfalls are likely over portions of interior New England on day 1, while wrap-around and lake effect snows are likely over the eastern Great Lakes through the St. Lawrence Valley.\n\nIn the West, a strong shortwave trough will amplify into the western Plains by 48 hours, supporting the spread of generally light rain and/or snow across the northern Intermountain and Rocky Mountain regions on day 1. Weak warm advection snows will spread across the northern Plains and upper Mississippi Valley ahead of an approaching warm front. As the upper trough and associated cold front progress eastward, rain is expected to overspread much of the central U.S., with broken snow from the upper Mississippi Valley into the Great Lakes by the end of day 2. Light snows are also likely to accompany the trailing arctic front as it weakens into the central Plains on day 2. By 48 hours, scattered showers are likely to develop over the western Gulf Coast region as Gulf inflow becomes established, aided by a prefrontal trough.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "aacbd8c4368c28c4", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42538:42542:1", "date": "1988-02-13 06:51:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42540:42544:1'} The data starts from February 13 00:00 and ends on February 13 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: In the East, the winter storm is making a fast exit northward, though snows will linger in northern New England through most of day 1 until the upper low lifts out. Upstream, a powerful Pacific short wave has maintained its strength after moving inland. The eastern Pacific ridge is rebounding, positioning this system for digging on the lee of the Rockies. Some of this short wave energy should move eastward in the northern stream of the westerlies, so upper troffing as a whole should behave more like a full latitude trough rather than fragmented short waves. At low levels, this scenario should pull cold Canadian air quickly southward into the Plains once the upper flow turns northwest. Breakdown of surface ridging in the western Gulf by 24 hours should allow a rapid influx of Gulf moisture, suggesting day 2 rains will spread from eastern Texas into the lower and mid Mississippi Valley by 48 hours.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "f1568e1aa1a5c46a", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42540:42544:1", "date": "1988-02-13 18:45:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42542:42546:1'} The data starts from February 13 12:00 and ends on February 14 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Main weather focus for the next 24 hours will be with the progression of an impressive short wave trough digging southeastward through Colorado. A deeper surface low will track through the mid Mississippi Valley by 24 hours, then into the Great Lakes by the end of the period. Although initial moisture is rather limited in advance of the cold front, rapid erosion of the surface ridge over the Gulf Coast is underway, which should ensure swift moisture return. Rain with embedded convection over the Gulf Coast should spread northward from east Texas into southern New England by 48 hours. Further north, an arctic front dropping southward into the Plains appears to be the last true arctic airmass to affect the U.S. for the foreseeable future, as broad split upper flow develops, allowing only Pacific fronts to spread across the country. One such Pacific front will enter the northwest Pacific coast on day 1, bringing mainly coastal rains over Washington. On day 2, the front will race quickly across the northern tier of states with mainly light precipitation, while lee troughing develops over the central and southern Plains, signaling a warmup there. Lingering snows will be on the wane early over northern New England, but warm frontal type snows are likely to spread across the region from the Great Lakes on day 2 ahead of the central Plains system.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "8d92cd9e19430c23", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42542:42546:1", "date": "1988-02-14 07:01:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42544:42548:1'} The data starts from February 14 00:00 and ends on February 14 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: In the east, a strong short wave over Kansas is expected to induce widespread frontal precipitation as it moves eastward into the moist Gulf inflow regime along the Mississippi Valley. The primary surface low and the best short wave energy will track northeast across the Great Lakes and St. Lawrence Valley. There is a possibility of a flat frontal wave moving northeast from the Carolinas during Day 2. Sustained inflow and good dynamics should bring frontal and prefrontal precipitation, primarily rain, to most areas of the eastern US, with the best chance for snow limited to overrunning areas of the northern regions.\n\nIn the west, the next onshore system moving over the west coast ridge is weaker than the previous one. However, advance moisture inflow and falling heights should produce snow in the Rockies and Canadian Plains.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "60603ce031b30929", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42544:42548:1", "date": "1988-02-14 19:03:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42546:42550:1'} The data starts from February 14 12:00 and ends on February 15 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A Pacific frontal system is currently moving through Washington State and will move rapidly southeastward as an upper short wave trough along 125W moves toward the central U.S. Shearing of short wave energy will support a weakening band of mainly frontal precipitation, with stronger northern dynamics suggesting the best, though light, snow will spread across the northern Plains into the upper Mississippi Valley. A trailing vorticity maximum forecast to drop into the central Rockies is expected to induce weak wave action on the cold front in the southern Plains within 48 hours; however, precipitation should be scattered at best due to limited moisture.\n\nA Pacific coast short wave trough will act as a kicker to a strong Mississippi Valley trough, sweeping an associated frontal system off the East Coast on day 2. Secondary wave development is expected in the southeastern states on day 1 as the primary surface low lifts northeastward through the eastern Great Lakes, spreading a swath of snow from the lower Great Lakes northeastward. The strength of the southern vorticity maximum, along with good inflow, supports the idea of widespread prefrontal rains over the southeastern U.S. northward, with snow in the overrunning band over northern New England. Thunderstorms should continue to spread eastward along the Gulf Coast, aided by a strong upper jet.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "273d4353716f2129", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42546:42550:1", "date": "1988-02-15 06:53:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42548:42552:1'} The data starts from February 15 00:00 and ends on February 15 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: The eastward movement of Pacific short waves continues. The easternmost of these has tapped Gulf moisture and should continue to spread precipitation along the eastern US front. Surface and 850 data suggest the low heading towards the St. Lawrence Valley will persist longer than previously forecast, though satellite shows a rapid weakening of upper support. This allows for quick development of a Carolina low triggered by the strong Tennessee short wave. Strong southwesterly flow and little cold air should make this storm act more like a spring storm, with the best precipitation as rain and most energy supplied by latent heat release. In the West, the next short wave is driving a Pacific cold front across the Rockies. Rebound of the western ridge and strong northwesterly flow aloft should keep the front moving quickly until about 48 hours from now, when the gradient relaxes and the flow turns more westerly. Lack of moisture should keep this system mostly dry except for southern Canada and the northern Great Lakes.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "6e928cc8b0179bc5", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42548:42552:1", "date": "1988-02-15 18:59:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42550:42554:1'} The data starts from February 15 12:00 and ends on February 16 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Cold front currently moving southeast from the northern Plains through the central Rockies will move rapidly east during the period, forced along by a short wave dropping southeast from Washington State. Due to the rapid movement of the front and lack of significant moisture, only scattered showers are expected to accompany the front from the central Plains south and east. Exceptions are from the Great Lakes eastward, where light overrunning snows will be aided by moderate positive vorticity advection, and over the southern Plains and Gulf Coast states, where return Gulf inflow combined with weak impulses in the upper flow will increase chances of showers. Large Pacific high will build in behind the front with seasonable temperatures and generally dry weather over much of the West. Cold front in the East will be swept rapidly off the East Coast early on Day 1 as a strong vorticity maximum in the Southeast lifts quickly northeast. Good warm advection and moisture associated with secondary low development over the Mid Atlantic coast will spread some decent rains over the Northeast early Day 1 with some locally moderate snows over eastern Maine. Scattered showers and thunderstorms should end early Day 1 over Florida as the trailing cold front slides off to the southeast.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "63f2f5892fa5caa1", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42550:42554:1", "date": "1988-02-16 06:42:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42552:42556:1'} The data starts from February 16 00:00 and ends on February 16 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: An active southern stream is developing due to continued building and slight retrogression of the West Coast ridge. The first short wave in this stream is expected to temporarily settle over Arizona, briefly closing off before moving eastward. A short wave in western Texas at 48 hours and a strong southwesterly flow aloft suggest a substantial area of overrunning and frontal precipitation will spread from southeastern New Mexico to the southern Appalachians as Gulf inflow becomes well established. Before that time, any short waves in the renewed southern stream are expected to be weak and shearing, with precipitation moving eastward from the western Gulf before dissipating in the drier southeastern United States. There is uncertainty regarding the strength of the system originating in central Mexico.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "b3ac3ecfdc38fbfb", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42552:42556:1", "date": "1988-02-16 19:09:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42554:42558:1'} The data starts from February 16 12:00 and ends on February 17 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Higher amplitude upper flow is expected across the U.S. during the next 48 hours as a ridge off the Pacific Coast allows shortwaves to move toward the Southwest U.S. A shortwave trough initially over the Southwest U.S. is forecast to briefly close off before being ejected eastward by a series of shortwaves. A strong vortex center is developing near 50N/140W. The associated cold front is expected to move through the Pacific Northwest into the Plains within 48 hours, with most precipitation occurring in the West. Some snow is likely to accompany the vortex maximum as it moves toward the Desert Southwest on day 2. Minor impulses in the subtropical flow will gradually increase the risk of showers along the western Gulf Coast states on day 1 as the cold front settles across the southern Plains and Mississippi Valley. By day 2, increased inflow of Gulf moisture combined with upper support from a shortwave lifting out from the Southwest should set up an overrunning pattern over much of the Gulf Coast into the Tennessee Valley. Scattered snow will spread across the Northeast, but upper support is lacking for significant amounts.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "b0219b1997ac654c", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42554:42558:1", "date": "1988-02-17 06:58:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42556:42560:1'} The data starts from February 17 00:00 and ends on February 17 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A strong shortwave system is crossing the northwest coast and will replace the current system in the southwestern US. This northern feature is expected to remain strong as it moves southward. Good attendant moisture and strong dynamics suggest that the Rockies and Basin regions will receive snow. As this system moves into place, it will push the current southwestern low eastward. Widespread precipitation is expected to spread from Texas to the Middle Atlantic states, enhanced by good Gulf inflow and overrunning/warm advection. Both high and low level factors suggest a deepening low over the central Gulf states at 48 hours. Meanwhile, a southward shift in the polar vortex indicates a return of arctic air near the northern US border.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "c03c5d70f1538ca2", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42556:42560:1", "date": "1988-02-17 19:00:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42558:42562:1'} The data starts from February 17 12:00 and ends on February 18 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A high amplitude split flow pattern is becoming established over the U.S. A short wave trough that amplified into the Southwest U.S. is being followed closely by an even stronger short wave currently dropping through the Pacific Northwest on the backside of a sharpening upper ridge. The Southwest U.S. upper trough should quickly lift to the east. Several weaker impulses preceding the main short wave trough have helped saturate the airmass along a slow-moving frontal boundary over the southern Plains and Gulf Coast states, setting up a good overrunning pattern. As the main upper trough moves out of the Southwest, expect a surface low to take shape along the Texas coast and track northeast along the frontal boundary. This should be a wet system for much of the South on Day 1, with rain spreading into the Mid Atlantic states and southern New England on Day 2, aided by good moisture inflow and warm advection. On Day 2, precipitation is expected over portions of the southern Plateau and southern Rockies as dynamics associated with the strong short wave, expected to close off in the Southwest, combine with increasing easterly flow and residual moisture for some broken snows.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "89b6e94d0d650d2d", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42558:42562:1", "date": "1988-02-18 07:02:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42560:42564:1'} The data starts from February 18 00:00 and ends on February 18 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Quasi-split flow within a broad-scale long wave trough over North America in the next 48 hours will be the highlight of the pattern aloft. A Great Basin shortwave digs in across the Four Corners before ejecting eastward by 48 hours in a more southerly stream, subsequently allowing a strong upper ridge position to shift eastward to along the West Coast and northward over extreme western Canada. This results in continued dry weather over the western states and southwest Canada. The Great Basin shortwave kicks out the Texas shortwave in the same stream, propagating a Texas coastal frontal wave across the lower Mississippi Valley. Meanwhile, a vortex straddling the Gulf Coast from Gulf warm frontogenesis becomes embedded in an amplifying short ridge across the southeastern states, which eventually induces a coastal trough and subsequent warm frontal wave/coastal secondary as better upper support nears the Carolinas. The primary surface low is expected to deepen and move north-northeastward to off Boston/Cape Cod by 48 hours. Much warming at low levels and aloft will keep most precipitation over most of New York and central/southern New England as rain. Elsewhere, a Yukon shortwave signals the beginning of the next series of arctic outbreaks, digging to south-central Canada and driving an arctic front to over central Great Lakes by 48 hours with typical snow squalls.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "bd42b32ce1ef9cb1", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42560:42564:1", "date": "1988-02-18 19:07:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42562:42566:1'} The data starts from February 18 12:00 and ends on February 19 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Eastern Pacific upper ridge is maintained while heights rapidly build in the northwestern Atlantic, allowing the polar vortex to slide southeastwards and the next arctic front to surge into the US. Powerful upper circulations are moving out of the Desert Southwest. The upper dynamics with the first system will allow a low to track west of the Appalachians with a secondary formation off the Mid-Atlantic coast by 24 hours in the area of strongest thermal gradients.\n\nNorthern New England will receive all snow from this system, while parts of the Northeast will experience a brief period of snow and sleet before it turns to rain due to initially dry low level air. A frontal wave will develop in the eastern Gulf of Mexico on day two, prolonging the rainfall threat along the Gulf Coast through the coastal Carolinas on Saturday. Considerable snow showers are expected with the arctic front along the Great Lakes, while the West remains mostly dry.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "67ef1bb2bf7a2489", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42562:42566:1", "date": "1988-02-19 07:10:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42564:42568:1'} The data starts from February 19 00:00 and ends on February 19 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: The upper trough over the Mississippi Valley moves rapidly northeastward through the next 24 hours as the associated surface system moves up the Ohio Valley, with only minor redevelopment along the Mid-Atlantic coast later today and tonight. Mild temperatures in the eastern US suggest that only substantial snow will occur in interior New England later tonight.\n\nThe southwestern US upper system moves eastward and weakens through the forecast period. No major cyclogenesis is expected off the southeastern US coast in 48 hours. Cold air will move into the eastern US within the next 36-48 hours, bringing cold, dry conditions for most of the eastern two-thirds of the US.\n\nPrecipitation is expected in the southeastern US in 48 hours. The southwestern US system may bring precipitation to southern Texas in the first 24 hours before its effects shift to the Gulf of Mexico.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "2713998a40564d6e", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42564:42568:1", "date": "1988-02-19 19:14:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42566:42570:1'} The data starts from February 19 12:00 and ends on February 20 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A strong spoke of the polar vortex is driving the next batch of arctic air into the northern Plains. With the strong northern stream of the westerlies now reestablished, this cold should quickly move southeastward into most of the eastern US by 36 hours. The tight gradient at all upper levels and a weak trailing surface ridge suggest much of the eastern US will remain windy through the period. In the shorter range, some drying is expected between the polar and arctic fronts for interior regions along the eastern seaboard. The exception is Florida, where overrunning should linger until the trough axis finally passes eastward. Farther west, upper ridging and a general flow from the northwest should keep the western half of the country dry.\n\nDuring day 2, frontal contrast across the northern US and southern Canada should markedly increase as Chinook-warmed air and low-level southerly flow make progress toward the Great Lakes. This strong flow will translate into warm advection precipitation, mostly snow, in advance of the warm front. Upstream, the next Pacific front will have some arctic air behind it, reaching southern British Columbia by 48 hours via Alaska and the Gulf of Alaska.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "354fca32dce1683b", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42566:42570:1", "date": "1988-02-20 07:12:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42568:42572:1'} The data starts from February 20 00:00 and ends on February 20 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A strong upper trough is located west of coastal Alaska and extends south-southeastward across 50N, 150W. This system is forecast to consolidate somewhat over the next 24 hours and dig southeastward to the Canadian/US continental divide. The subsequent cold advection should drive substantially colder air southeastward over western Canada, eastern Washington, northern Idaho, and most of Montana than has occurred recently. Intense upper dynamics straddling the continental divide should generate mainly mountain snows. A cold front is expected across the northern Plains, Wyoming, northern Utah, and Nevada westward. Precipitation remains back in the cold air where upper dynamics dominate.\n\nThe above pattern will push out the initial vortex complex over the Great Lakes and northeastern states, which will drive a moderately arctic boundary across the eastern states and subsequently weaken while adding thermal support to the leading cold front now offshore. The best precipitation will be in the cold advection in the form of snow squalls across the eastern Great Lakes.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "9908a099958befb6", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42568:42572:1", "date": "1988-02-20 19:13:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42570:42574:1'} The data starts from February 20 12:00 and ends on February 21 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Effects from the deep Hudson's Bay vortex are expected to continue to expand, controlling the weather of the entire continent by 48 hours. In the East, one branch of this vortex is driving the next blast of cold air eastward. So far, this cold air has struggled to move southward and eastward, so the timing should be slowed a bit during day 1. By 48 hours, temperatures should already be on the rise from the Rockies eastward as the best of the cold advection will be well into the Atlantic.\n\nUpstream, a more sustainable turn to arctic air is in store as the huge vortex lowers heights substantially in western Canada and the flow shifts to one with origins in the far northern latitudes. This process will occur in two steps. The first will be to usher in the height falls behind a shearing short wave digging southward from Alaska and British Columbia. These significant height falls support the deep and expansive surface system centered in southern Canada. This system will be highlighted by strong winds, but does not preclude widespread warm advection snow ahead of the warm front.\n\nWith the upper pattern set, the next spoke of the polar vortex should bring more cold air southward, along with moisture and frontal snow.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "405a69ec58199d1a", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42570:42574:1", "date": "1988-02-21 07:19:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42572:42576:1'} The data starts from February 21 00:00 and ends on February 21 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A strong mid-latitude polar jet over the mid-Pacific moves eastward, compressing and amplifying the upper ridge along the west coast of North America. This allows a complex dynamic pattern over western Canada and Alaska to dig southeastward under the strong polar jet. By 24 hours, this surge of energy aloft will support a strengthening polar front across the northern Plains to the western Great Lakes. The deep polar vortex initially over northern Hudson Bay will move southward, with an associated vortex lobe rotating about its western flank, supporting a weak arctic boundary near the US-Canadian border in 24 hours and a subsequent double frontal structure. Arctic air will move further south and east, tightening the thermal gradient and leading to a stronger polar front.\n\nGuidance suggests the front will penetrate southward across northern Texas, with a thrust of the upper jet and dynamic surge becoming more easterly by 48 hours, placing the cold front along or just east of the Appalachians.\n\nThe only significant precipitation will be across the Great Lakes, where cold advection, positive vorticity advection, and low-level cyclonic flow will cause snow squalls. Some light snow is possible near the triple point northward over northeastern New York and northern New England into Canada.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "251fa9fe540805b9", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42572:42576:1", "date": "1988-02-21 18:48:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42574:42578:1'} The data starts from February 21 12:00 and ends on February 22 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Eastern two thirds of the country will experience another period of winter cold as a polar vortex moves southeastward toward James Bay over the next two days. An upper level ridge in northwestern Canada and over Iceland is blocking the vortex, causing it to move southward while it slowly weakens. Arctic and polar fronts will remain separate for about 36 hours, with a slower movement of the polar front.\n\nA strong short wave trough near Calgary tonight is expected to rotate under the polar vortex and produce a weak wave on the polar front. Any surface development should be weak due to decreasing upper dynamics over time. Initially, dry air and limited moisture inflow will restrict precipitation to a narrow area. Deep cyclonic flow and weak low level convergence will allow snow squalls to persist in the Great Lakes region long after the arctic front passes. The west will remain warm and dry for now, but a southern jet stream is expected to bring changes to the west coast later this week.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "91f1c8e0aa5e2df8", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42574:42578:1", "date": "1988-02-22 07:16:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42576:42580:1'} The data starts from February 22 00:00 and ends on February 22 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A deepening, massive, near full-latitude trough will dominate the eastern two-thirds of North America within 48 hours, bringing a return to wintry weather and colder temperatures for most areas east of the Rockies within 36-48 hours. Despite the weakening of the Arctic boundary, strong cold air advection at all levels will strengthen the polar front as it moves off the East Coast and becomes stationary across the northern Gulf under westerly flow aloft. Most of the frontal passage will bring only light showers. The main wintry weather will be confined to the vicinity of the Great Lakes, where cyclonic cold advection will generate snow squalls to the lee of the lakes.\n\nOver the Pacific, a strong polar jet near 40N will move eastward then northward, shifting the upper ridge eastward to the far western US and Canada. A weakening Pacific weather front will approach the coast by 48 hours, but with the upper dynamics moving northward, only clouds are expected. The remainder of the western states will be dry and unseasonably warm for this time of year.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "16b7e50f99d23e47", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42576:42580:1", "date": "1988-02-22 19:06:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42578:42582:1'} The data starts from February 22 12:00 and ends on February 23 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A basically dry pattern across the country should continue, but a strong short wave now in the lower Great Lakes will bring frontal and post-frontal precipitation during Day 1. There is some uncertainty in the timing of the front in the East, but current trends favor a slower progression. Light snow is expected to graze the upper Great Lakes. Despite significant ice cover on much of the Great Lakes, strongly cyclonic flow and sustained cold temperatures should keep lake effect snow active. In the West, the progression of a large blocking ridge should allow the next eastern Pacific front to approach the California coast within 48 hours. After that, there is a good chance that Pacific westerlies may begin to undercut the ridge and reactivate the southern stream.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "30fe43bf2aa3e86c", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42578:42582:1", "date": "1988-02-23 07:00:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42580:42584:1'} The data starts from February 23 00:00 and ends on February 23 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: High winds and isolated areas of moderate to heavy snow are associated with an eastward moving cold front. Otherwise, conditions are dry coast to coast except in the southern states, where an isolated shower may occur in the vicinity of the frontal passage. A weakening Pacific weather front well off the west coast is struggling to survive due to a strong upper ridge over western North America. The boundary front dissipates by the end of the period as upper support splits, with a weak southern portion off the southern California coast, but this has little weather consequence.\n\nA strong upper jet and lower level dynamics are driving the cold front rapidly eastward, especially from the southern Appalachians northward. Most precipitation will occur behind the front as the best dynamics are well west of the front.\n\nThe front drops to extreme southern Florida or just south of Miami by 48 hours as a major trough axis moves eastward to the Florida peninsula position and upper flow becomes slightly north of west upstream.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "7d56969d9b94b453", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42580:42584:1", "date": "1988-02-23 18:32:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42582:42586:1'} The data starts from February 23 12:00 and ends on February 24 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: With this morning’s exit of the East Coast cold front, dry weather will again dominate. East of the Rockies, this dryness will be marked by seasonably cold air as the link to far northern latitudes remains unbroken. During day 2, some progression of the western ridge and lowering pressures in Canada should allow warmer western air to work eastward into the Plains, aided by some downslope winds. Exceptions to this dry scenario include Florida, where the cold front may take a day or so to clear the state, and the Great Lakes, where only a slight relaxation of the cyclonic flow and cold air is expected, but not enough to shut down the lake effect snow showers. In the far West, dry conditions will continue for the next two days. Immediate precipitation hopes are pinned on the eastward progression of a strong system near 150W as the western US ridge edges eastward.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "7f40eb1f317bf1a5", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42582:42586:1", "date": "1988-02-24 07:15:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42584:42588:1'} The data starts from February 24 00:00 and ends on February 24 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A short wave associated with an upper low near 30N/130W is forecast to move southeastward to Baja, taking any rain with it south of the U.S. A strong upper low in the Gulf of Alaska is forecast to send a short wave southeastward to near 135W in the next 48 hours, carving a sharp upper trough and pushing the upper ridge eastward to the northern Rockies and Plateau. With the emphasis on the digging of the upper trough, precipitation accompanying the cold front should be delayed and remain well off the West Coast. The frontal boundary preceding the new cold front is forecast to dissipate in the next 12-24 hours as it encounters the upper ridge along the West Coast. Any precipitation associated with this boundary should be forced into western Canada. A broad upper trough over the Ohio Valley and Great Lakes is forecast to move northeastward to the northeastern U.S. and eastern Canada in the next 48 hours. This will allow for a long stretch of northwesterly flow aloft from the northern Rockies to the southeastern U.S. Dry and cold air is forecast to dominate the eastern half of the U.S., while a warming trend is likely across the eastern Rockies and central Plains. Though the upper trough is forecast to exit the Great Lakes, lake effect snows should be slow to dissipate. Near the end of the second 24-hour period, overrunning snow is likely as a short wave moves southeastward from central Canada and warm advection occurs from a retreating warm front. Southern Florida is forecast to have scattered precipitation in the next 12-18 hours as a cold front moves through the region.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "0ebc6365ae861881", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42584:42588:1", "date": "1988-02-24 18:44:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42586:42590:1'} The data starts from February 24 12:00 and ends on February 25 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Events underway in the central Pacific indicate that a progression of the mean weather pattern is occurring. The Gulf of Alaska low is lifting and filling, and the leading edge of the Pacific westerlies is pressing eastward. Though progress will be slow, this change in pattern should bring the best chance for far western precipitation so far this month. Coastal precipitation is expected within 48 hours. Scattered convection is expected over the southwestern U.S. at 48 hours. Farther east, the lifting and filling of the Hudson Bay vortex will allow more emphasis on digging Canadian short waves. The next of these should be a milder and slower version of its Alberta counterpart, with scattered or better light snow likely due to sufficient relative humidity and dynamics.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "ebc8b9ec13cf9aa5", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42586:42590:1", "date": "1988-02-25 07:21:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42588:42592:1'} The data starts from February 25 00:00 and ends on February 25 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A short wave near 150W is forecast to move east-southeastward to the vicinity of 130W while developing a closed low. A significant amount of cold air is dropping in behind the short wave, which should enhance the deepening of the upper trough and associated surface low. The surface low is expected to be deeper than previously forecast, increasing easterly flow at the surface over California, resulting in drier air. Significant precipitation is expected to move eastward to the Sierra Range in the next 48 hours, but may be slower to arrive. The developing closed low is forecast to move a weakening upper low near 130W northeastward as an open wave to Baja and the southwestern U.S. Little or no precipitation is expected with this system as it is forecast to lift into a weak upper ridge over the southern Rockies. A strong upper ridge over the northern Rockies is forecast to keep that region dry over the next two days. A short wave is forecast to drop rapidly southeastward from central Canada to New England in the next 48 hours, spreading overrunning snow from the northern Mississippi Valley eastward through the Great Lakes to northern New England. After passage of the surface low and associated cold front, low-level cold advection should bring the return of lake effect snows. During the second 24-hour period, scattered rain could return to southern Texas due to return flow of the surface ridge and weak impulses forecast to move through the southern stream.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "99964be2230cc8b6", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42588:42592:1", "date": "1988-02-25 18:59:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42590:42594:1'} The data starts from February 25 12:00 and ends on February 26 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Upper trough just northwest of 35N, 140W digs in and becomes cutoff west of the California coast by 48 hours. Dryness continues over the western states except portions of California as a vortex rotates about the eventual cutoff. The polar jet remains strong over western Canada, so bundles of wave energy should continue moving steadily along. With the mean trough position remaining southward from eastern Canada to the vicinity of the east coast, a shortwave near Lake Winnipeg will dig to over the northeastern states by 48 hours. The best precipitation with this weather system from the northern Great Lakes east-southeastward should remain well north of the surface low and weak warm boundary where positive vorticity advection and 850 mb warm advection pattern are most favorable. A disturbance aloft drifting northeastward from northwestern Mexico will continue weakening into the mean ridge position, so prospects are dim for any significant precipitation.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "c3ec0502ed2ecd95", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42590:42594:1", "date": "1988-02-26 06:47:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42592:42596:1'} The data starts from February 26 00:00 and ends on February 26 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Closed low near 140W is forecast to drift slowly south-southeastward to vicinity of 30N/130W in the next 48 hours. With movement parallel to the California coast, the brunt of precipitation associated with the cold front and surface low should be slow to reach California. There is the possibility of scattered showers ahead of the main system with some weak vorticity lobes. Significant precipitation should not reach California until 48 hours, with the cold front near the California coast.\n\nIn the East, a clipper-like system is forecast to race rapidly southeastward through the Great Lakes to the Mid-Atlantic coast, then slow during the second 24-hour period as it approaches a block in the central Atlantic. This should spread overrunning snow through the Great Lakes and New England, but with the system moving so fast during day 1, amounts should be light and too far off the coast to have any major impact on day 2.\n\nAnother system is forecast to ride the western Canada upper ridge, then dig southeastward to south-central Saskatchewan. This system should not have any effect on northern tier states through the forecast period except to push a new cold front to northern Montana and northern Plains.\n\nDown south, weak vorticity centers are forecast to move through the southern stream from Baja to Gulf Coastal states.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "0013b475baf06f84", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42592:42596:1", "date": "1988-02-26 18:57:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42594:42598:1'} The data starts from February 26 12:00 and ends on February 27 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A cutoff low is expected to meander near 130W, then begin a slow movement by 48 hours as another system moves eastward along 40-50N. The southern portion of the trough may remain quasi-stationary for a longer duration. A vorticity lobe on the east side will drift northward and northwestward while weakening. Scattered precipitation will slowly expand northward in California and nearby areas.\n\nAn upper trough over northwestern Canada in the polar jet will move southeast toward Lake Superior by 48 hours, similar to the previous system, with the intensity of the upper trough and surface developments also similar. The associated air mass is primarily of maritime origin with little change expected as it moves across Canada to the north-central states. Arctic air will remain north of the system near Hudson Bay.\n\nA system at the surface and aloft over the eastern Great Lakes is expected to continue off the Jersey coast today, with little deepening expected. Little precipitation is expected due to the absence of favorable warm advection. Some post-frontal snow showers are possible to the east of the eastern Great Lakes and Appalachians, but low-level flow suggests these will be of short duration.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "dc0cb8b947f97dc9", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42594:42598:1", "date": "1988-02-27 06:57:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42596:42600:1'} The data starts from February 27 00:00 and ends on February 27 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A short wave near 165W will push a closed low near 30N/130W northeastward to the California coast. As the upper low lifts northeastward, it is forecast to eject vorticity lobes across California and the southern Great Basin over the next 48 hours. The initial surge during the first 24 hours is likely to produce broken precipitation along the entire California coast to the central Sierra range, then scattered precipitation for the remainder of the forecast period across the Great Basin.\n\nAcross eastern Texas, scattered rain is likely as a weak impulse drops southeastward from New Mexico to the northern Gulf during day 1. Scattered convection is possible along the Texas coast as a cold front approaches on day 2.\n\nA clipper-like system continues to drop rapidly southeastward to the Mid-Atlantic coast, then slowly eastward. On its trek southeastward, it should spread snow from southern New England to the Delmarva area over the next 12-18 hours.\n\nAnother clipper is forecast to drop southeastward from northern Alberta to just north of the Great Lakes over the next 48 hours. It is forecast to spread a new area of broken snow across the upper Mississippi Valley and Great Lakes during the 24-48 hour period while dragging a cold front rapidly southeastward through the central Plains to the Ohio Valley and southern Mississippi Valley.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "d67082b50363410d", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42596:42600:1", "date": "1988-02-27 18:46:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42598:42602:1'} The data starts from February 27 12:00 and ends on February 28 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A strong upper trough and associated jet at 250 mb near 40N, 160-170W is forecast to move east over the eastern Pacific. The southern part of the trough and jet will dislodge a closed low off the California coast, forcing it northeast then north while weakening late as the stronger northern portion of the Pacific trough approaches. A series of vortices and troughs will drift north over the western states, keeping the region cloudy and unsettled with scattered precipitation.\n\nMeanwhile, the next shortwave over south-central Canada will plunge southeast into the eastern US and Canada. The air mass in the wake of the front is moderately maritime, but within 24 hours, a secondary cold front is expected over Lake Superior as arctic air moves south from Hudson Bay across the Great Lakes to the central Appalachians by 48 hours. Snow activity will break out across the Great Lakes and Appalachians due to strong upper-level dynamics. Over the mid-Atlantic region, snow activity is possible, especially as a vortex center is forecast across West Virginia and central Virginia. Tonight’s threat is moving out to sea as upstream features provide the necessary push.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "8ba81188aac671f7", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42598:42602:1", "date": "1988-02-28 07:11:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42600:42604:1'} The data starts from February 28 00:00 and ends on February 28 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Double vortex structure between 160W-155W is forecast to push eastward, with the northern portion rotating around the Aleutian closed low and the southern vortex digging southeastward to replace the closed low near 130W. The initial upper low near 130W is forecast to lift slowly northward and parallel to the California coast as it weakens. It will be replaced by a new closed low during the second 24-hour period, maintaining split flow across the Pacific Northwest. Although the initial upper low is expected to weaken, it is still expected to eject lobes of vorticity across California and the Great Basin regions over the next 48 hours. Most precipitation is likely to remain along the California coast and western slopes of the Sierra Range.\n\nA train of Alberta clippers is forecast to continue over the next 48 hours as a short wave in Manitoba drops rapidly southeastward to southern New England. The main surface low associated with this system is forecast to rotate around the polar vortex, while minor surface waves could develop along the frontal boundary in eastern Canada and off the Mid-Atlantic coast. No significant development is expected from any of these systems, as the surface low presently in the eastern Atlantic blocks any inflow of Atlantic moisture. Once surface waves enter the eastern Atlantic, they should begin northward movement due to strong blocking upper ridge in the central Atlantic.\n\nBroken snow associated with this short wave should remain across the Great Lakes and northeastern U.S. in the vicinity of best upper dynamics. Otherwise, lake effect snows should occur after the passage of polar and arctic frontal boundaries.\n\nA third in a series of short waves is forecast to move through the Gulf of Alaska and over the upper ridge to central Saskatchewan in the next 48 hours. This should not have any effect on the U.S. during this forecast period but is likely to spread snow into the northern Plains in the following period.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "7ef596b5743e033c", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42600:42604:1", "date": "1988-02-28 18:59:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42602:42606:1'} The data starts from February 28 12:00 and ends on February 29 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Split flow over the eastern Pacific will be maintained as wave energy in the southern branch moves east-southeastward, replacing the filling closed low now off the California coast. As the closed low drifts northeastward over the western states and Great Basin region, vorticity spokes will drift about the upper feature, keeping most of the area cloudy and unsettled with some scattered precipitation.\n\nA shortwave over Yukon of Pacific origin, with a maritime surface air mass, will dig southeastward to south of Lake Winnipeg. In 48 hours, the open surface wave structure is likely to be in southern Minnesota at the base of the thermal ridge. Important precipitation is likely to remain well north of the surface center, deep over cold air where upper support and thermal gradient are most favorable.\n\nA short ridge in advance will drive out the upper trough now over the Great Lakes, with no appreciable development along or off the East Coast northeastward to over the Maritimes. Cold advection will be across the Mid-Atlantic region northward over the northeastern states.\n\nElsewhere across the southern tier of states, west-northwesterly flow aloft becoming more zonal with time will keep the entire region basically dry for most of the period. A weak vorticity feature over the west-central Plains by 48 hours hints at some shower activity but is not highly convincing at this time.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "1e892c81d116cb47", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42602:42606:1", "date": "1988-02-29 06:53:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42604:42608:1'} The data starts from February 29 00:00 and ends on February 29 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: Split flow over the eastern Pacific is forecast to break down in the next 48 hours as a short wave near 130W lifts northeastward to the Gulf of Alaska and a closed low near 125W weakens and lifts into the Great Basin as an open wave. This will allow zonal flow over the central and eastern Pacific to amplify and develop an upper ridge just off the West Coast. The northern short wave should not develop any precipitation across the Pacific Northwest, though the weakening upper low and associated vortices are forecast to spread broken to scattered rain into California. Precipitation could change to or mix with snow at higher elevations of the Sierra Range and Plateau region. As the upper low moves into the Great Basin, expect minor impulses to move ahead of the main system in the southern stream to the lower Plains. This should combine with the return flow of Gulf moisture during the second 24-hour period to develop convection from the Texas coast to the central Plains and Mississippi Valley. Two areas of concentrated convection are expected: one near the short wave forecast to move through Kansas and along the cold front, and the other along the Texas coast where moisture convergence should be the best. Up north, the third in a series of Alberta clippers is forecast to drop southeastward to southern Saskatchewan, then curve east-northeastward through the base of the upper trough and around the polar vortex. The bulk of snow associated with this system is forecast to remain north of the border, with only scattered precipitation in the vicinity of the cold front at the end of day two.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "17f04742b442cc81", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42604:42608:1", "date": "1988-02-29 18:51:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42606:42610:1'} The data starts from February 29 12:00 and ends on March 01 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A split flow pattern aloft off the West Coast is shifting slowly eastward over western North America over the next 48 hours. A shortwave in the southern branch at 37N,127W is digging to extreme northwestern Mexico, driving an upper trough and embedded vorticity maxima over the southwestern states eastward. A stronger shortwave in the northern branch is weakening over southeastern Alaska due to the entrenched upper ridge over western Canada and the Hudson Bay polar vortex. Only scattered precipitation is expected for the Pacific Northwest and surrounding areas. A weak upper trough drifting eastward over the western states keeps the region unsettled along and west of the Divide, with precipitation emphasis shifting slowly eastward.\n\nA shortwave over Alberta is digging in along the US-Canadian border and eastward over the northern Great Lakes, caused in part by a short ridge moving over the eastern states by 48 hours. An associated cold front should drop over the central Plains and then northeastward to the Ohio Valley. There will be little precipitation along the front across the northern tier due to lack of upper support and unfavorable low-level conditions.\n\nLater in the period, as the western trough shifts flow aloft to southwesterly from Texas northeastward to the Mississippi-Ohio confluence, the combination of upper diffluence and low-level moisture from the western Gulf will focus on the eastern half of Oklahoma and most of Arkansas by late in the period. This will result in a sizeable area of broken precipitation activity, including some convective activity.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "6edb3535e5f5f72b", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42606:42610:1", "date": "1988-03-01 07:10:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42608:42612:1'} The data starts from March 01 00:00 and ends on March 01 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: The short wave currently moving through California will significantly impact weather over the next two days and beyond. This system is stronger than previously indicated and is causing notable warm advection as Gulf inflow clashes with another blast of Canadian air. Colder air is expected to move more easily into Texas, allowing the cold front to extend farther southwest in the eastern US and reducing the northern edge of post-frontal overrunning.\n\nPrecipitation is expected to develop in Oklahoma and Texas and spread eastward during the period. Strong Gulf inflow will be supported by upper-level difluence and a series of weak short wave ripples moving from Mexico.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "d9ab5b708d586743", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42608:42612:1", "date": "1988-03-01 19:09:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42610:42614:1'} The data starts from March 01 12:00 and ends on March 02 06:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: An upper low moves eastward to the vicinity of the Gulf of Alaska by 48 hours as a series of shortwaves traverse the area ahead of the main feature, continuing to bring more surges of Pacific maritime air into Alaska and northwestern Canada. The tail-end of these shortwaves brushes southwestern Canada and the Pacific Northwest eastward but brings only a slight dose of precipitation to the region. Meanwhile, a twin shortwave complex near Lake Winnipeg drops east-southeastward just north of the Great Lakes to the Canadian Maritimes by 48 hours, pushing a cold front clear of New England and back west-southwestward over the Mid-Atlantic area as a thrust of cold air moves over the Great Lakes and Ohio Valley. The western end of the cold front drops early to Oklahoma and Texas, then plunges to the Gulf Coast–Rio Grande Valley position as a shortwave complex over northwestern Mexico and New Mexico–western Texas is pushed east-northeastward by a strong California shortwave, inducing a frontal wave near Arkansas. In the interim, there will be plenty of convective activity over the warm sector and overrunning over the cold sector due to upper dynamics and increasing low-level moisture inflow from the Gulf. Most of Oklahoma, northern and northeastern Texas, and all of Arkansas and vicinity are expected to experience the brunt of convective activity and precipitation. After the lead impulse clears the area, not much is left for the California shortwave to affect later in the period over the southern Four Corners region.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "b021840361eaf958", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42610:42614:1", "date": "1988-03-02 07:11:00" } }, { "prompt": "The following data shows the global weather fields for 24 hours, sampled at 6 hour intervals. {'type': 'wb2', 'variables': ['mean_sea_level_pressure', '10m_u_component_of_wind', '10m_v_component_of_wind', '2m_temperature', 'surface_pressure', 'geopotential', 'specific_humidity', 'temperature', 'u_component_of_wind', 'v_component_of_wind'], 'time_indices': '42612:42616:1'} The data starts from March 02 00:00 and ends on March 02 18:00. Based on the above data, answer the following question in a detailed report:", "question": "Provide a detailed meteorological discussion and forecast for the continental United States based on the given atmospheric data. Your analysis should include: (1) current weather system positions and movements affecting the US, (2) temperature trends and expected changes over the coming days, (3) precipitation patterns and likelihood of significant weather events, (4) pressure system evolution and their impacts on US weather, (5) any notable atmospheric features (fronts, jet stream position, etc.) that will influence US weather patterns. Focus on translating the observational data into actionable meteorological insights and forecasts for the continental US.", "response": "The meteorological discussion and forecast for the continental United States is: A southern stream is becoming the focus for active weather as two major shortwaves are involved with the trough over the southwestern United States and northern Mexico. The first wave is expected to weaken as it tracks northeastward to the Ohio Valley. Before it weakens, it is expected to aid in the development of significant convection over east Texas and the lower Mississippi Valley. An active precipitation pattern over the southeastern United States will also be associated with the second, stronger wave, with stronger cyclogenesis expected. The position of the rain/snow line is uncertain for the Mid-Atlantic region, with a tendency toward warmer conditions.\n\nA healthy upper trough and stronger onshore flow are expected for the Pacific Northwest. Weather over the southwestern states should become quieter beyond 12 hours under drier northwesterly flow aloft, with lingering precipitation over eastern Colorado likely to diminish.", "metadata": { "prompt_id": "UXG5NN", "question_id": "IGzIt0", "level": "2c", "eval_type": "discussion", "forced_extreme_window": false, "task_id": "9189a170fac82651", "difficulty": "hard" }, "data_desc": { "type": "wb2", "variables": [ "mean_sea_level_pressure", "10m_u_component_of_wind", "10m_v_component_of_wind", "2m_temperature", "surface_pressure", "geopotential", "specific_humidity", "temperature", "u_component_of_wind", "v_component_of_wind" ], "time_indices": "42612:42616:1", "date": "1988-03-02 19:12:00" } } ]