simen
commited on
Commit
·
353cc28
1
Parent(s):
575baef
formatting
Browse files
app.py
CHANGED
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@@ -1,4 +1,4 @@
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import xarray as xr
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from siphon.catalog import TDSCatalog
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import numpy as np
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@@ -12,6 +12,7 @@ from scipy.interpolate import griddata
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import folium
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import branca.colormap as cm
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@st.cache_data(ttl=60)
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def find_latest_meps_file():
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# The MEPS dataset: https://github.com/metno/NWPdocs/wiki/MEPS-dataset
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@@ -36,8 +37,8 @@ def load_meps_for_location(file_path=None, altitude_min=0, altitude_max=3000):
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if file_path is None:
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file_path = find_latest_meps_file()
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x_range= "[220:1:300]"
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y_range= "[420:1:500]"
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time_range = "[0:1:66]"
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hybrid_range = "[25:1:64]"
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height_range = "[0:1:0]"
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@@ -51,8 +52,8 @@ def load_meps_for_location(file_path=None, altitude_min=0, altitude_max=3000):
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"longitude": f"{y_range}{x_range}",
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"latitude": f"{y_range}{x_range}",
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"air_temperature_ml": f"{time_range}{hybrid_range}{y_range}{x_range}",
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"ap"
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"b"
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"surface_air_pressure": f"{time_range}{height_range}{y_range}{x_range}",
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"x_wind_ml": f"{time_range}{hybrid_range}{y_range}{x_range}",
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"y_wind_ml": f"{time_range}{hybrid_range}{y_range}{x_range}",
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@@ -63,7 +64,7 @@ def load_meps_for_location(file_path=None, altitude_min=0, altitude_max=3000):
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subset = xr.open_dataset(path, cache=True)
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subset.load()
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time_range_sfc = "[0:1:0]"
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surf_params = {
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"x": x_range,
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@@ -71,19 +72,20 @@ def load_meps_for_location(file_path=None, altitude_min=0, altitude_max=3000):
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"time": f"{time_range}",
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"surface_geopotential": f"{time_range_sfc}[0:1:0]{y_range}{x_range}",
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"air_temperature_0m": f"{time_range}[0:1:0]{y_range}{x_range}",
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}
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file_path_surf = f"{file_path.replace('meps_det_ml','meps_det_sfc')}?{','.join(f'{k}{v}' for k, v in surf_params.items())}"
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# Load surface parameters and merge into the main dataset
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surf = xr.open_dataset(file_path_surf, cache=True)
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# Convert the surface geopotential to elevation
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elevation = (surf.surface_geopotential / 9.80665).squeeze()
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#elevation.plot()
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subset[
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air_temperature_0m = surf.air_temperature_0m.squeeze()
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subset[
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# subset.elevation.plot()
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def hybrid_to_height(ds):
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"""
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ds = subset
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@@ -93,56 +95,58 @@ def load_meps_for_location(file_path=None, altitude_min=0, altitude_max=3000):
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g = 9.80665 # Gravitational acceleration
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# Calculate the pressure at each level
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p = ds[
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# Get the temperature at each level
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T = ds[
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# Calculate the height difference between each level and the surface
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dp = ds[
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dT = T - T.isel(hybrid=-1) # Temperature difference relative to the surface
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dT_mean = 0.5 * (T + T.isel(hybrid=-1)) # Mean temperature
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# Calculate the height using the hypsometric equation
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dz = (R * dT_mean / g) * np.log(ds[
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return dz
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altitude = hybrid_to_height(subset).mean("time").squeeze().mean("x").mean("y")
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subset = subset.assign_coords(altitude=(
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subset = subset.swap_dims({
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# filter subset on altitude ranges
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subset = subset.where(
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wind_speed = np.sqrt(subset[
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subset = subset.assign(wind_speed=((
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subset
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#subset = subset.assign(thermal_temp_diff=(('time', 'altitude','y','x'), thermal_temp_diff.data))
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# Find the indices where the thermal temperature difference is zero or negative
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# Create tiny value at ground level to avoid finding the ground as the thermal top
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thermal_temp_diff = subset[
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thermal_temp_diff = thermal_temp_diff.where(
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(thermal_temp_diff.sum("altitude")>0)
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indices = (thermal_temp_diff > 0).argmax(dim="altitude")
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# Get the altitudes corresponding to these indices
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thermal_top = subset.altitude[indices]
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subset = subset.assign(thermal_top=((
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subset = subset.set_coords(["latitude", "longitude"])
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return subset
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def compute_thermal_temp_difference(subset):
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lapse_rate = 0.0098
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ground_temp = subset.air_temperature_0m-273.3
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air_temp =
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# dimensions
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# 'air_temperature_ml' altitude: 4 y: 3, x: 3
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@@ -157,89 +161,111 @@ def compute_thermal_temp_difference(subset):
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thermal_temp_diff = (ground_parcel_temp - air_temp).clip(min=0)
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return thermal_temp_diff
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def wind_and_temp_colorscales(wind_max=20, tempdiff_max=8):
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# build colorscale for thermal temperature difference
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wind_colors =
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wind_positions = [0,
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wind_positions_norm = [i/wind_max for i in wind_positions]
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# Create the colormap
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windcolors = mcolors.LinearSegmentedColormap.from_list(
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# build colorscale for thermal temperature difference
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thermal_colors =
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thermal_positions =
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thermal_positions_norm = [i/tempdiff_max for i in thermal_positions]
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# Create the colormap
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tempcolors = mcolors.LinearSegmentedColormap.from_list(
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return windcolors, tempcolors
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@st.cache_data(ttl=60)
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def create_wind_map(_subset, x_target, y_target, altitude_max=4000, date_start=None, date_end=None):
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"""
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altitude_max = 3000
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date_start = None
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date_end = None
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"""
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subset = _subset
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wind_min, wind_max = 0.3, 20
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tempdiff_min, tempdiff_max = 0, 8
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windplot_data = subset.sel(x=x_target, y=y_target, method="nearest")
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# Filter time periods and altitudes
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if date_start is None:
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date_start = datetime.datetime.fromtimestamp(
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if date_end is None:
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date_end = datetime.datetime.fromtimestamp(
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new_timestamps = pd.date_range(date_start, date_end, 20)
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windplot_data = windplot_data.interp(altitude=new_altitude, time=new_timestamps)
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#
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#
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)
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quiverplot.colorbar.set_label("Wind Speed [m/s]")
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quiverplot.colorbar.pad = 0.01
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# fill bottom with brown color
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plt.ylim(bottom=0)
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ax.fill_between(windplot_data.time, 0, windplot_data.elevation.mean(), color="brown", alpha=0.5)
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# add numerical labels to the plot
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for x, t in enumerate(windplot_data.time.values):
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for y, alt in enumerate(windplot_data.altitude.values):
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color = windcolors(norm(windplot_data.wind_speed[x,y]))
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ax.text(t+5, alt+20, f"{windplot_data.wind_speed[x,y]:.1f}", size=6, color=color)
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plt.title(f"Wind and thermals in point starting at {date_start.strftime('%Y-%m-%d')} (UTC)")
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plt.yscale("linear")
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return fig
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@st.cache_data(ttl=7200)
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def create_sounding(_subset, date, hour, x_target, y_target, altitude_max=3000):
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"""
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@@ -249,8 +275,8 @@ def create_sounding(_subset, date, hour, x_target, y_target, altitude_max=3000):
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y_target = 5
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"""
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subset = _subset
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lapse_rate = 0.0098
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subset = subset.where(subset.altitude< altitude_max,drop=True)
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# Create a figure object
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fig, ax = plt.subplots()
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# Plot the dry adiabatic lines
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for i in range(T0.shape[1]):
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ax.plot(T_adiabatic[:, i], ds.altitude,
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# Plot the actual temperature profiles
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time_str = f"{date} {hour}:00:00"
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# find x and y values cloeset to given latitude and longitude
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ds_time = subset.sel(time=time_str, x=x_target,y=y_target, method="nearest")
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T =
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ax.plot(
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# Define the surface temperature
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T_surface = T[-1]+3
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T_parcel = T_surface - lapse_rate * ds_time.altitude
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# Plot the temperature of the rising air parcel
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filter = T_parcel>T
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ax.plot(
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add_dry_adiabatic_lines(ds_time)
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ax.set_xlabel(
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ax.set_ylabel(
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ax.set_title(
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ax.set_xlim(xmin, xmax)
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ax.grid(True)
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# Return the figure object
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return fig
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@st.cache_data(ttl=7200)
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def build_map_overlays(_subset, date=None, hour=None):
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"""
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y_target=None
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"""
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subset = _subset
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# Get the latitude and longitude values from the dataset
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latitude_values = subset.latitude.values.flatten()
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longitude_values = subset.longitude.values.flatten()
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thermal_top_values = subset.thermal_top.sel(time=f"{date}T{hour}").values.flatten()
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#thermal_top_values = subset.elevation.mean("altitude").values.flatten()
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# Convert the irregular grid data into a regular grid
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step_lon, step_lat =
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grid_z = np.nan_to_num(grid_z, copy=False, nan=0)
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# Normalize the grid data to a range suitable for image display
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heightcolor = cm.LinearColormap(
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colors
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index
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vmin=0,
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bounds = [
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return img_overlay, heightcolor
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import pyproj
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def latlon_to_xy(lat, lon):
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crs = pyproj.CRS.from_cf(
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{
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@@ -347,25 +412,28 @@ def latlon_to_xy(lat, lon):
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proj = pyproj.Proj.from_crs(4326, crs, always_xy=True)
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# Compute projected coordinates of lat/lon point
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X,Y = proj.transform(lon,lat)
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return X,Y
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# %%
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def show_forecast():
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with st.spinner('Fetching data...'):
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if "file_path" not in st.session_state:
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st.session_state.file_path = find_latest_meps_file()
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subset = load_data(st.session_state.file_path)
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def date_controls():
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now = datetime.datetime.now().replace(minute=0, second=0, microsecond=0)
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if "forecast_date" not in st.session_state:
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st.session_state.forecast_date = (now + datetime.timedelta(days=1)).date()
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if "forecast_time" not in st.session_state:
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st.session_state.forecast_time = datetime.time(14,0)
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if "forecast_length" not in st.session_state:
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st.session_state.forecast_length = 1
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if "altitude_max" not in st.session_state:
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st.session_state.target_latitude = 61.22908
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if "target_longitude" not in st.session_state:
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st.session_state.target_longitude = 7.09674
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col1, col_date, col_time, col3 = st.columns([0.2,0.6,0.2,0.2])
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with col1:
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if st.button("⏮️", use_container_width=True):
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st.session_state.forecast_date -= datetime.timedelta(days=1)
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with col3:
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if st.button(
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st.session_state.forecast_date += datetime.timedelta(days=1)
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with col_date:
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st.session_state.forecast_date = st.date_input(
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"Start date",
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value=st.session_state.forecast_date,
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min_value=start_stop_time[0],
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max_value=start_stop_time[1],
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label_visibility="collapsed",
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disabled=True
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with col_time:
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st.session_state.forecast_time = st.time_input(
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date_controls()
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time_start = datetime.time(0, 0)
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# convert subset.attrs['min_time']='2024-05-11T06:00:00Z' into datetime
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min_time = datetime.datetime.strptime(
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date_start = datetime.datetime.combine(st.session_state.forecast_date, time_start)
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date_start = max(date_start, min_time)
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date_end= datetime.datetime.combine(
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## MAP
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with st.expander("Map", expanded=True):
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from streamlit_folium import st_folium
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st.cache_data(ttl=30)
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def build_map(date, hour):
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m = folium.Map(
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img_overlay, heightcolor = build_map_overlays(subset, date=date, hour=hour)
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img_overlay.add_to(m)
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m.add_child(heightcolor,name="Thermal Height (m)")
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m.add_child(folium.LatLngPopup())
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| 416 |
return m
|
| 417 |
-
|
| 418 |
-
|
| 419 |
-
|
| 420 |
-
|
| 421 |
-
|
| 422 |
-
|
| 423 |
-
|
| 424 |
-
|
|
|
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|
|
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|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
| 425 |
wind_fig = create_wind_map(
|
| 426 |
-
|
| 427 |
-
|
| 428 |
-
|
| 429 |
-
|
| 430 |
-
|
| 431 |
-
|
|
|
|
| 432 |
st.pyplot(wind_fig)
|
| 433 |
plt.close()
|
| 434 |
-
|
| 435 |
|
| 436 |
with st.expander("More settings", expanded=False):
|
| 437 |
-
st.session_state.forecast_length = st.number_input(
|
| 438 |
-
|
| 439 |
-
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 440 |
############################
|
| 441 |
######### SOUNDING #########
|
| 442 |
############################
|
| 443 |
st.markdown("---")
|
| 444 |
with st.expander("Sounding", expanded=False):
|
| 445 |
-
date = datetime.datetime.combine(
|
|
|
|
|
|
|
| 446 |
|
| 447 |
-
with st.spinner(
|
| 448 |
sounding_fig = create_sounding(
|
| 449 |
-
subset,
|
| 450 |
-
date=date.date(),
|
| 451 |
-
hour=date.hour,
|
| 452 |
altitude_max=st.session_state.altitude_max,
|
| 453 |
x_target=x_target,
|
| 454 |
-
y_target=y_target
|
|
|
|
| 455 |
st.pyplot(sounding_fig)
|
| 456 |
plt.close()
|
| 457 |
|
| 458 |
-
st.markdown(
|
|
|
|
|
|
|
| 459 |
|
| 460 |
# Download new forecast if available
|
| 461 |
st.session_state.file_path = find_latest_meps_file()
|
| 462 |
subset = load_data(st.session_state.file_path)
|
| 463 |
|
|
|
|
| 464 |
@st.cache_data
|
| 465 |
def load_data(filepath):
|
| 466 |
-
local=False
|
| 467 |
if local:
|
| 468 |
subset = xr.open_dataset("subset.nc")
|
| 469 |
else:
|
|
@@ -471,27 +582,28 @@ def load_data(filepath):
|
|
| 471 |
subset.to_netcdf("subset.nc")
|
| 472 |
return subset
|
| 473 |
|
|
|
|
| 474 |
if __name__ == "__main__":
|
| 475 |
run_streamlit = True
|
| 476 |
if run_streamlit:
|
| 477 |
-
st.set_page_config(page_title="PGWeather",page_icon="🪂", layout="wide")
|
| 478 |
show_forecast()
|
| 479 |
else:
|
| 480 |
lat = 61.22908
|
| 481 |
lon = 7.09674
|
| 482 |
x_target, y_target = latlon_to_xy(lat, lon)
|
| 483 |
-
|
| 484 |
dataset_file_path = find_latest_meps_file()
|
| 485 |
subset = load_data(dataset_file_path)
|
| 486 |
|
| 487 |
build_map_overlays(subset, date="2024-05-14", hour="16")
|
| 488 |
|
| 489 |
-
wind_fig = create_wind_map(
|
| 490 |
-
|
|
|
|
| 491 |
|
| 492 |
# Plot thermal top on a map for a specific time
|
| 493 |
-
#subset.sel(time=subset.time.min()).thermal_top.plot()
|
| 494 |
-
sounding_fig = create_sounding(
|
| 495 |
-
|
| 496 |
-
|
| 497 |
-
|
|
|
|
| 1 |
+
# %%
|
| 2 |
import xarray as xr
|
| 3 |
from siphon.catalog import TDSCatalog
|
| 4 |
import numpy as np
|
|
|
|
| 12 |
import folium
|
| 13 |
import branca.colormap as cm
|
| 14 |
|
| 15 |
+
|
| 16 |
@st.cache_data(ttl=60)
|
| 17 |
def find_latest_meps_file():
|
| 18 |
# The MEPS dataset: https://github.com/metno/NWPdocs/wiki/MEPS-dataset
|
|
|
|
| 37 |
if file_path is None:
|
| 38 |
file_path = find_latest_meps_file()
|
| 39 |
|
| 40 |
+
x_range = "[220:1:300]"
|
| 41 |
+
y_range = "[420:1:500]"
|
| 42 |
time_range = "[0:1:66]"
|
| 43 |
hybrid_range = "[25:1:64]"
|
| 44 |
height_range = "[0:1:0]"
|
|
|
|
| 52 |
"longitude": f"{y_range}{x_range}",
|
| 53 |
"latitude": f"{y_range}{x_range}",
|
| 54 |
"air_temperature_ml": f"{time_range}{hybrid_range}{y_range}{x_range}",
|
| 55 |
+
"ap": f"{hybrid_range}",
|
| 56 |
+
"b": f"{hybrid_range}",
|
| 57 |
"surface_air_pressure": f"{time_range}{height_range}{y_range}{x_range}",
|
| 58 |
"x_wind_ml": f"{time_range}{hybrid_range}{y_range}{x_range}",
|
| 59 |
"y_wind_ml": f"{time_range}{hybrid_range}{y_range}{x_range}",
|
|
|
|
| 64 |
subset = xr.open_dataset(path, cache=True)
|
| 65 |
subset.load()
|
| 66 |
|
| 67 |
+
# %% get geopotential
|
| 68 |
time_range_sfc = "[0:1:0]"
|
| 69 |
surf_params = {
|
| 70 |
"x": x_range,
|
|
|
|
| 72 |
"time": f"{time_range}",
|
| 73 |
"surface_geopotential": f"{time_range_sfc}[0:1:0]{y_range}{x_range}",
|
| 74 |
"air_temperature_0m": f"{time_range}[0:1:0]{y_range}{x_range}",
|
| 75 |
+
}
|
| 76 |
+
file_path_surf = f"{file_path.replace('meps_det_ml', 'meps_det_sfc')}?{','.join(f'{k}{v}' for k, v in surf_params.items())}"
|
| 77 |
|
| 78 |
# Load surface parameters and merge into the main dataset
|
| 79 |
surf = xr.open_dataset(file_path_surf, cache=True)
|
| 80 |
# Convert the surface geopotential to elevation
|
| 81 |
elevation = (surf.surface_geopotential / 9.80665).squeeze()
|
| 82 |
+
# elevation.plot()
|
| 83 |
+
subset["elevation"] = elevation
|
| 84 |
air_temperature_0m = surf.air_temperature_0m.squeeze()
|
| 85 |
+
subset["air_temperature_0m"] = air_temperature_0m
|
| 86 |
+
|
| 87 |
# subset.elevation.plot()
|
| 88 |
+
# %%
|
| 89 |
def hybrid_to_height(ds):
|
| 90 |
"""
|
| 91 |
ds = subset
|
|
|
|
| 95 |
g = 9.80665 # Gravitational acceleration
|
| 96 |
|
| 97 |
# Calculate the pressure at each level
|
| 98 |
+
p = ds["ap"] + ds["b"] * ds["surface_air_pressure"] # .mean("ensemble_member")
|
| 99 |
|
| 100 |
# Get the temperature at each level
|
| 101 |
+
T = ds["air_temperature_ml"] # .mean("ensemble_member")
|
| 102 |
|
| 103 |
# Calculate the height difference between each level and the surface
|
| 104 |
+
dp = ds["surface_air_pressure"] - p # Pressure difference
|
| 105 |
dT = T - T.isel(hybrid=-1) # Temperature difference relative to the surface
|
| 106 |
dT_mean = 0.5 * (T + T.isel(hybrid=-1)) # Mean temperature
|
| 107 |
|
| 108 |
# Calculate the height using the hypsometric equation
|
| 109 |
+
dz = (R * dT_mean / g) * np.log(ds["surface_air_pressure"] / p)
|
| 110 |
|
| 111 |
return dz
|
| 112 |
+
|
|
|
|
| 113 |
altitude = hybrid_to_height(subset).mean("time").squeeze().mean("x").mean("y")
|
| 114 |
+
subset = subset.assign_coords(altitude=("hybrid", altitude.data))
|
| 115 |
+
subset = subset.swap_dims({"hybrid": "altitude"})
|
| 116 |
|
| 117 |
# filter subset on altitude ranges
|
| 118 |
+
subset = subset.where(
|
| 119 |
+
(subset.altitude >= altitude_min) & (subset.altitude <= altitude_max), drop=True
|
| 120 |
+
).squeeze()
|
| 121 |
|
| 122 |
+
wind_speed = np.sqrt(subset["x_wind_ml"] ** 2 + subset["y_wind_ml"] ** 2)
|
| 123 |
+
subset = subset.assign(wind_speed=(("time", "altitude", "y", "x"), wind_speed.data))
|
| 124 |
|
| 125 |
+
subset["thermal_temp_diff"] = compute_thermal_temp_difference(subset)
|
| 126 |
+
# subset = subset.assign(thermal_temp_diff=(('time', 'altitude','y','x'), thermal_temp_diff.data))
|
|
|
|
| 127 |
|
| 128 |
# Find the indices where the thermal temperature difference is zero or negative
|
| 129 |
# Create tiny value at ground level to avoid finding the ground as the thermal top
|
| 130 |
+
thermal_temp_diff = subset["thermal_temp_diff"]
|
| 131 |
thermal_temp_diff = thermal_temp_diff.where(
|
| 132 |
+
(thermal_temp_diff.sum("altitude") > 0)
|
| 133 |
+
| (subset["altitude"] != subset.altitude.min()),
|
| 134 |
+
thermal_temp_diff + 1e-6,
|
| 135 |
+
)
|
| 136 |
indices = (thermal_temp_diff > 0).argmax(dim="altitude")
|
| 137 |
# Get the altitudes corresponding to these indices
|
| 138 |
thermal_top = subset.altitude[indices]
|
| 139 |
+
subset = subset.assign(thermal_top=(("time", "y", "x"), thermal_top.data))
|
| 140 |
subset = subset.set_coords(["latitude", "longitude"])
|
| 141 |
|
| 142 |
return subset
|
| 143 |
|
| 144 |
|
| 145 |
+
# %%
|
| 146 |
def compute_thermal_temp_difference(subset):
|
| 147 |
lapse_rate = 0.0098
|
| 148 |
+
ground_temp = subset.air_temperature_0m - 273.3
|
| 149 |
+
air_temp = subset["air_temperature_ml"] - 273.3 # .ffill(dim='altitude')
|
| 150 |
|
| 151 |
# dimensions
|
| 152 |
# 'air_temperature_ml' altitude: 4 y: 3, x: 3
|
|
|
|
| 161 |
thermal_temp_diff = (ground_parcel_temp - air_temp).clip(min=0)
|
| 162 |
return thermal_temp_diff
|
| 163 |
|
| 164 |
+
|
| 165 |
def wind_and_temp_colorscales(wind_max=20, tempdiff_max=8):
|
| 166 |
# build colorscale for thermal temperature difference
|
| 167 |
+
wind_colors = ["grey", "blue", "green", "yellow", "red", "purple"]
|
| 168 |
+
wind_positions = [0, 0.5, 3, 7, 12, 20] # transition points
|
| 169 |
+
wind_positions_norm = [i / wind_max for i in wind_positions]
|
| 170 |
|
| 171 |
# Create the colormap
|
| 172 |
+
windcolors = mcolors.LinearSegmentedColormap.from_list(
|
| 173 |
+
"", list(zip(wind_positions_norm, wind_colors))
|
| 174 |
+
)
|
| 175 |
|
| 176 |
# build colorscale for thermal temperature difference
|
| 177 |
+
thermal_colors = ["white", "white", "red", "violet", "darkviolet"]
|
| 178 |
+
thermal_positions = [0, 0.2, 2.0, 4, 8]
|
| 179 |
+
thermal_positions_norm = [i / tempdiff_max for i in thermal_positions]
|
| 180 |
|
| 181 |
# Create the colormap
|
| 182 |
+
tempcolors = mcolors.LinearSegmentedColormap.from_list(
|
| 183 |
+
"", list(zip(thermal_positions_norm, thermal_colors))
|
| 184 |
+
)
|
| 185 |
return windcolors, tempcolors
|
| 186 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 187 |
|
| 188 |
+
import plotly.graph_objects as go
|
| 189 |
+
import numpy as np
|
| 190 |
+
import pandas as pd
|
| 191 |
+
import datetime
|
| 192 |
|
| 193 |
|
| 194 |
+
@st.cache_data(ttl=60)
|
| 195 |
+
def create_wind_map(
|
| 196 |
+
subset, x_target, y_target, altitude_max=4000, date_start=None, date_end=None
|
| 197 |
+
):
|
| 198 |
+
subset_data = subset
|
| 199 |
+
|
| 200 |
wind_min, wind_max = 0.3, 20
|
| 201 |
tempdiff_min, tempdiff_max = 0, 8
|
| 202 |
+
wind_colors = ["grey", "blue", "green", "yellow", "red", "purple"]
|
| 203 |
+
|
|
|
|
|
|
|
|
|
|
| 204 |
if date_start is None:
|
| 205 |
+
date_start = datetime.datetime.fromtimestamp(
|
| 206 |
+
subset.time.min().values.astype("int64") // 1e9
|
| 207 |
+
)
|
| 208 |
if date_end is None:
|
| 209 |
+
date_end = datetime.datetime.fromtimestamp(
|
| 210 |
+
subset.time.max().values.astype("int64") // 1e9
|
| 211 |
+
)
|
| 212 |
+
|
| 213 |
+
# Resample time and altitude for the wind plot data.
|
| 214 |
new_timestamps = pd.date_range(date_start, date_end, 20)
|
| 215 |
+
new_altitude = np.arange(
|
| 216 |
+
subset_data.elevation.mean(), altitude_max, altitude_max / 20
|
| 217 |
+
)
|
| 218 |
+
|
| 219 |
+
windplot_data = subset_data.sel(x=x_target, y=y_target, method="nearest")
|
| 220 |
windplot_data = windplot_data.interp(altitude=new_altitude, time=new_timestamps)
|
| 221 |
|
| 222 |
+
# Convert data for Plotly heatmap
|
| 223 |
+
thermal_diff = windplot_data["thermal_temp_diff"].T.values
|
| 224 |
+
times = [pd.Timestamp(time).strftime("%H:%M") for time in windplot_data.time.values]
|
| 225 |
+
altitudes = windplot_data.altitude.values
|
| 226 |
+
|
| 227 |
+
# Creating Plotly heatmap
|
| 228 |
+
fig = go.Figure(
|
| 229 |
+
data=go.Heatmap(
|
| 230 |
+
z=thermal_diff,
|
| 231 |
+
x=times,
|
| 232 |
+
y=altitudes,
|
| 233 |
+
colorscale="YlGn",
|
| 234 |
+
colorbar=dict(title="Thermal Temperature Difference (°C)"),
|
| 235 |
+
zmin=tempdiff_min,
|
| 236 |
+
zmax=tempdiff_max,
|
| 237 |
+
)
|
| 238 |
)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 239 |
|
| 240 |
+
# Add wind quiver plots (Note: Plotly doesn't support quivers directly like matplotlib; consider using streamlines or other visualization methods for precise vector representation).
|
| 241 |
+
speed = np.sqrt(windplot_data["x_wind_ml"] ** 2 + windplot_data["y_wind_ml"] ** 2).T
|
| 242 |
+
fig.add_trace(
|
| 243 |
+
go.Scatter(
|
| 244 |
+
x=times,
|
| 245 |
+
y=altitudes,
|
| 246 |
+
mode="markers",
|
| 247 |
+
marker=dict(
|
| 248 |
+
size=8,
|
| 249 |
+
color=speed,
|
| 250 |
+
colorscale=wind_colors,
|
| 251 |
+
colorbar=dict(title="Wind Speed (m/s)"),
|
| 252 |
+
),
|
| 253 |
+
text=[f"Speed: {s:.2f} m/s" for s in speed.flatten()],
|
| 254 |
+
hoverinfo="text",
|
| 255 |
+
)
|
| 256 |
+
)
|
| 257 |
|
| 258 |
+
# Update layout
|
| 259 |
+
fig.update_layout(
|
| 260 |
+
title=f"Wind and Thermals Starting at {date_start.strftime('%Y-%m-%d')} (UTC)",
|
| 261 |
+
xaxis=dict(title="Time"),
|
| 262 |
+
yaxis=dict(title="Altitude (m)"),
|
| 263 |
+
)
|
| 264 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 265 |
return fig
|
| 266 |
|
| 267 |
+
|
| 268 |
+
# %%
|
| 269 |
@st.cache_data(ttl=7200)
|
| 270 |
def create_sounding(_subset, date, hour, x_target, y_target, altitude_max=3000):
|
| 271 |
"""
|
|
|
|
| 275 |
y_target = 5
|
| 276 |
"""
|
| 277 |
subset = _subset
|
| 278 |
+
lapse_rate = 0.0098 # in degrees Celsius per meter
|
| 279 |
+
subset = subset.where(subset.altitude < altitude_max, drop=True)
|
| 280 |
# Create a figure object
|
| 281 |
fig, ax = plt.subplots()
|
| 282 |
|
|
|
|
| 293 |
|
| 294 |
# Plot the dry adiabatic lines
|
| 295 |
for i in range(T0.shape[1]):
|
| 296 |
+
ax.plot(T_adiabatic[:, i], ds.altitude, "r:", alpha=0.5)
|
| 297 |
|
| 298 |
# Plot the actual temperature profiles
|
| 299 |
time_str = f"{date} {hour}:00:00"
|
| 300 |
# find x and y values cloeset to given latitude and longitude
|
| 301 |
|
| 302 |
+
ds_time = subset.sel(time=time_str, x=x_target, y=y_target, method="nearest")
|
| 303 |
+
T = ds_time["air_temperature_ml"].values - 273.3 # in degrees Celsius
|
| 304 |
+
ax.plot(
|
| 305 |
+
T, ds_time.altitude, label=f"temp {pd.to_datetime(time_str).strftime('%H:%M')}"
|
| 306 |
+
)
|
| 307 |
|
| 308 |
# Define the surface temperature
|
| 309 |
+
T_surface = T[-1] + 3
|
| 310 |
T_parcel = T_surface - lapse_rate * ds_time.altitude
|
| 311 |
|
| 312 |
# Plot the temperature of the rising air parcel
|
| 313 |
+
filter = T_parcel > T
|
| 314 |
+
ax.plot(
|
| 315 |
+
T_parcel[filter],
|
| 316 |
+
ds_time.altitude[filter],
|
| 317 |
+
label="Rising air parcel",
|
| 318 |
+
color="green",
|
| 319 |
+
)
|
| 320 |
|
| 321 |
add_dry_adiabatic_lines(ds_time)
|
| 322 |
|
| 323 |
+
ax.set_xlabel("Temperature (°C)")
|
| 324 |
+
ax.set_ylabel("Altitude (m)")
|
| 325 |
+
ax.set_title(
|
| 326 |
+
f"Temperature Profile and Dry Adiabatic Lapse Rate for {date} {hour}:00"
|
| 327 |
+
)
|
| 328 |
+
ax.legend(title="Time")
|
| 329 |
+
xmin, xmax = (
|
| 330 |
+
ds_time["air_temperature_ml"].min().values - 273.3,
|
| 331 |
+
ds_time["air_temperature_ml"].max().values - 273.3 + 3,
|
| 332 |
+
)
|
| 333 |
ax.set_xlim(xmin, xmax)
|
| 334 |
ax.grid(True)
|
| 335 |
|
| 336 |
# Return the figure object
|
| 337 |
return fig
|
| 338 |
|
| 339 |
+
|
| 340 |
@st.cache_data(ttl=7200)
|
| 341 |
def build_map_overlays(_subset, date=None, hour=None):
|
| 342 |
"""
|
|
|
|
| 346 |
y_target=None
|
| 347 |
"""
|
| 348 |
subset = _subset
|
| 349 |
+
|
| 350 |
# Get the latitude and longitude values from the dataset
|
| 351 |
latitude_values = subset.latitude.values.flatten()
|
| 352 |
longitude_values = subset.longitude.values.flatten()
|
| 353 |
thermal_top_values = subset.thermal_top.sel(time=f"{date}T{hour}").values.flatten()
|
| 354 |
+
# thermal_top_values = subset.elevation.mean("altitude").values.flatten()
|
| 355 |
# Convert the irregular grid data into a regular grid
|
| 356 |
+
step_lon, step_lat = (
|
| 357 |
+
subset.longitude.diff("x").quantile(0.1).values,
|
| 358 |
+
subset.latitude.diff("y").quantile(0.1).values,
|
| 359 |
+
)
|
| 360 |
+
grid_x, grid_y = np.mgrid[
|
| 361 |
+
min(latitude_values) : max(latitude_values) : step_lat,
|
| 362 |
+
min(longitude_values) : max(longitude_values) : step_lon,
|
| 363 |
+
]
|
| 364 |
+
grid_z = griddata(
|
| 365 |
+
(latitude_values, longitude_values),
|
| 366 |
+
thermal_top_values,
|
| 367 |
+
(grid_x, grid_y),
|
| 368 |
+
method="linear",
|
| 369 |
+
)
|
| 370 |
grid_z = np.nan_to_num(grid_z, copy=False, nan=0)
|
| 371 |
# Normalize the grid data to a range suitable for image display
|
| 372 |
heightcolor = cm.LinearColormap(
|
| 373 |
+
colors=["white", "white", "green", "yellow", "orange", "red", "darkblue"],
|
| 374 |
+
index=[0, 500, 1000, 1500, 2000, 2500, 3000],
|
| 375 |
+
vmin=0,
|
| 376 |
+
vmax=3000,
|
| 377 |
+
caption="Thermal Height (m)",
|
| 378 |
+
)
|
| 379 |
|
| 380 |
+
bounds = [
|
| 381 |
+
[min(latitude_values), min(longitude_values)],
|
| 382 |
+
[max(latitude_values), max(longitude_values)],
|
| 383 |
+
]
|
| 384 |
+
img_overlay = folium.raster_layers.ImageOverlay(
|
| 385 |
+
image=grid_z,
|
| 386 |
+
bounds=bounds,
|
| 387 |
+
colormap=heightcolor,
|
| 388 |
+
opacity=0.4,
|
| 389 |
+
mercator_project=True,
|
| 390 |
+
origin="lower",
|
| 391 |
+
pixelated=False,
|
| 392 |
+
)
|
| 393 |
|
| 394 |
return img_overlay, heightcolor
|
| 395 |
|
| 396 |
+
|
| 397 |
+
# %%
|
| 398 |
import pyproj
|
| 399 |
+
|
| 400 |
+
|
| 401 |
def latlon_to_xy(lat, lon):
|
| 402 |
crs = pyproj.CRS.from_cf(
|
| 403 |
{
|
|
|
|
| 412 |
proj = pyproj.Proj.from_crs(4326, crs, always_xy=True)
|
| 413 |
|
| 414 |
# Compute projected coordinates of lat/lon point
|
| 415 |
+
X, Y = proj.transform(lon, lat)
|
| 416 |
+
return X, Y
|
| 417 |
+
|
| 418 |
+
|
| 419 |
# %%
|
| 420 |
def show_forecast():
|
| 421 |
+
with st.spinner("Fetching data..."):
|
|
|
|
| 422 |
if "file_path" not in st.session_state:
|
| 423 |
st.session_state.file_path = find_latest_meps_file()
|
| 424 |
subset = load_data(st.session_state.file_path)
|
| 425 |
|
| 426 |
def date_controls():
|
| 427 |
+
start_stop_time = [
|
| 428 |
+
subset.time.min().values.astype("M8[ms]").astype("O"),
|
| 429 |
+
subset.time.max().values.astype("M8[ms]").astype("O"),
|
| 430 |
+
]
|
| 431 |
now = datetime.datetime.now().replace(minute=0, second=0, microsecond=0)
|
| 432 |
|
| 433 |
if "forecast_date" not in st.session_state:
|
| 434 |
st.session_state.forecast_date = (now + datetime.timedelta(days=1)).date()
|
| 435 |
if "forecast_time" not in st.session_state:
|
| 436 |
+
st.session_state.forecast_time = datetime.time(14, 0)
|
| 437 |
if "forecast_length" not in st.session_state:
|
| 438 |
st.session_state.forecast_length = 1
|
| 439 |
if "altitude_max" not in st.session_state:
|
|
|
|
| 442 |
st.session_state.target_latitude = 61.22908
|
| 443 |
if "target_longitude" not in st.session_state:
|
| 444 |
st.session_state.target_longitude = 7.09674
|
| 445 |
+
col1, col_date, col_time, col3 = st.columns([0.2, 0.6, 0.2, 0.2])
|
| 446 |
|
| 447 |
with col1:
|
| 448 |
if st.button("⏮️", use_container_width=True):
|
| 449 |
st.session_state.forecast_date -= datetime.timedelta(days=1)
|
| 450 |
with col3:
|
| 451 |
+
if st.button(
|
| 452 |
+
"⏭️",
|
| 453 |
+
use_container_width=True,
|
| 454 |
+
disabled=(st.session_state.forecast_date == start_stop_time[1]),
|
| 455 |
+
):
|
| 456 |
st.session_state.forecast_date += datetime.timedelta(days=1)
|
| 457 |
with col_date:
|
| 458 |
st.session_state.forecast_date = st.date_input(
|
| 459 |
+
"Start date",
|
| 460 |
+
value=st.session_state.forecast_date,
|
| 461 |
+
min_value=start_stop_time[0],
|
| 462 |
+
max_value=start_stop_time[1],
|
| 463 |
label_visibility="collapsed",
|
| 464 |
+
disabled=True,
|
| 465 |
+
)
|
| 466 |
with col_time:
|
| 467 |
+
st.session_state.forecast_time = st.time_input(
|
| 468 |
+
"Start time",
|
| 469 |
+
value=st.session_state.forecast_time,
|
| 470 |
+
step=3600,
|
| 471 |
+
disabled=False,
|
| 472 |
+
label_visibility="collapsed",
|
| 473 |
+
)
|
| 474 |
|
| 475 |
date_controls()
|
| 476 |
time_start = datetime.time(0, 0)
|
| 477 |
# convert subset.attrs['min_time']='2024-05-11T06:00:00Z' into datetime
|
| 478 |
+
min_time = datetime.datetime.strptime(
|
| 479 |
+
subset.attrs["min_time"], "%Y-%m-%dT%H:%M:%SZ"
|
| 480 |
+
)
|
| 481 |
date_start = datetime.datetime.combine(st.session_state.forecast_date, time_start)
|
| 482 |
date_start = max(date_start, min_time)
|
| 483 |
+
date_end = datetime.datetime.combine(
|
| 484 |
+
st.session_state.forecast_date
|
| 485 |
+
+ datetime.timedelta(days=st.session_state.forecast_length),
|
| 486 |
+
datetime.time(0, 0),
|
| 487 |
+
)
|
| 488 |
|
| 489 |
## MAP
|
| 490 |
with st.expander("Map", expanded=True):
|
| 491 |
from streamlit_folium import st_folium
|
| 492 |
+
|
| 493 |
st.cache_data(ttl=30)
|
| 494 |
+
|
| 495 |
def build_map(date, hour):
|
| 496 |
+
m = folium.Map(
|
| 497 |
+
location=[61.22908, 7.09674], zoom_start=9, tiles="openstreetmap"
|
| 498 |
+
)
|
| 499 |
img_overlay, heightcolor = build_map_overlays(subset, date=date, hour=hour)
|
| 500 |
+
|
| 501 |
img_overlay.add_to(m)
|
| 502 |
+
m.add_child(heightcolor, name="Thermal Height (m)")
|
| 503 |
m.add_child(folium.LatLngPopup())
|
| 504 |
return m
|
| 505 |
+
|
| 506 |
+
m = build_map(
|
| 507 |
+
date=st.session_state.forecast_date, hour=st.session_state.forecast_time
|
| 508 |
+
)
|
| 509 |
+
map = st_folium(m)
|
| 510 |
+
|
| 511 |
+
def get_pos(lat, lng):
|
| 512 |
+
return lat, lng
|
| 513 |
+
|
| 514 |
+
if map["last_clicked"] is not None:
|
| 515 |
+
st.session_state.target_latitude, st.session_state.target_longitude = (
|
| 516 |
+
get_pos(map["last_clicked"]["lat"], map["last_clicked"]["lng"])
|
| 517 |
+
)
|
| 518 |
+
|
| 519 |
+
x_target, y_target = latlon_to_xy(
|
| 520 |
+
st.session_state.target_latitude, st.session_state.target_longitude
|
| 521 |
+
)
|
| 522 |
wind_fig = create_wind_map(
|
| 523 |
+
subset,
|
| 524 |
+
date_start=date_start,
|
| 525 |
+
date_end=date_end,
|
| 526 |
+
altitude_max=st.session_state.altitude_max,
|
| 527 |
+
x_target=x_target,
|
| 528 |
+
y_target=y_target,
|
| 529 |
+
)
|
| 530 |
st.pyplot(wind_fig)
|
| 531 |
plt.close()
|
|
|
|
| 532 |
|
| 533 |
with st.expander("More settings", expanded=False):
|
| 534 |
+
st.session_state.forecast_length = st.number_input(
|
| 535 |
+
"multiday",
|
| 536 |
+
1,
|
| 537 |
+
3,
|
| 538 |
+
1,
|
| 539 |
+
step=1,
|
| 540 |
+
)
|
| 541 |
+
st.session_state.altitude_max = st.number_input(
|
| 542 |
+
"Max altitude", 0, 4000, 3000, step=500
|
| 543 |
+
)
|
| 544 |
+
|
| 545 |
############################
|
| 546 |
######### SOUNDING #########
|
| 547 |
############################
|
| 548 |
st.markdown("---")
|
| 549 |
with st.expander("Sounding", expanded=False):
|
| 550 |
+
date = datetime.datetime.combine(
|
| 551 |
+
st.session_state.forecast_date, st.session_state.forecast_time
|
| 552 |
+
)
|
| 553 |
|
| 554 |
+
with st.spinner("Building sounding..."):
|
| 555 |
sounding_fig = create_sounding(
|
| 556 |
+
subset,
|
| 557 |
+
date=date.date(),
|
| 558 |
+
hour=date.hour,
|
| 559 |
altitude_max=st.session_state.altitude_max,
|
| 560 |
x_target=x_target,
|
| 561 |
+
y_target=y_target,
|
| 562 |
+
)
|
| 563 |
st.pyplot(sounding_fig)
|
| 564 |
plt.close()
|
| 565 |
|
| 566 |
+
st.markdown(
|
| 567 |
+
"Wind and sounding data from MEPS model (main model used by met.no), including the estimated ground temperature. Ive probably made many errors in this process."
|
| 568 |
+
)
|
| 569 |
|
| 570 |
# Download new forecast if available
|
| 571 |
st.session_state.file_path = find_latest_meps_file()
|
| 572 |
subset = load_data(st.session_state.file_path)
|
| 573 |
|
| 574 |
+
|
| 575 |
@st.cache_data
|
| 576 |
def load_data(filepath):
|
| 577 |
+
local = False
|
| 578 |
if local:
|
| 579 |
subset = xr.open_dataset("subset.nc")
|
| 580 |
else:
|
|
|
|
| 582 |
subset.to_netcdf("subset.nc")
|
| 583 |
return subset
|
| 584 |
|
| 585 |
+
|
| 586 |
if __name__ == "__main__":
|
| 587 |
run_streamlit = True
|
| 588 |
if run_streamlit:
|
| 589 |
+
st.set_page_config(page_title="PGWeather", page_icon="🪂", layout="wide")
|
| 590 |
show_forecast()
|
| 591 |
else:
|
| 592 |
lat = 61.22908
|
| 593 |
lon = 7.09674
|
| 594 |
x_target, y_target = latlon_to_xy(lat, lon)
|
| 595 |
+
|
| 596 |
dataset_file_path = find_latest_meps_file()
|
| 597 |
subset = load_data(dataset_file_path)
|
| 598 |
|
| 599 |
build_map_overlays(subset, date="2024-05-14", hour="16")
|
| 600 |
|
| 601 |
+
wind_fig = create_wind_map(
|
| 602 |
+
subset, altitude_max=3000, x_target=x_target, y_target=y_target
|
| 603 |
+
)
|
| 604 |
|
| 605 |
# Plot thermal top on a map for a specific time
|
| 606 |
+
# subset.sel(time=subset.time.min()).thermal_top.plot()
|
| 607 |
+
sounding_fig = create_sounding(
|
| 608 |
+
subset, date="2024-05-12", hour=15, x_target=x_target, y_target=y_target
|
| 609 |
+
)
|
|
|