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juliensimon
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swpc-alerts

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xet
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product_id
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17 values
issue_datetime
timestamp[us]date
2026-02-23 21:39:45
2026-03-25 08:26:18
message
large_stringlengths
291
1.15k
alert_type
large_stringclasses
4 values
K05W
2026-02-23T21:39:45.773000
Space Weather Message Code: WARK05 Serial Number: 2200 Issue Time: 2026 Feb 23 2139 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2026 Feb 23 2140 UTC Valid To: 2026 Feb 24 0600 UTC Warning Condition: Onset NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WARNING
K04W
2026-02-23T22:05:19.380000
Space Weather Message Code: WARK04 Serial Number: 5269 Issue Time: 2026 Feb 23 2205 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5268 Valid From: 2026 Feb 21 2230 UTC Now Valid Until: 2026 Feb 24 1200 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
EF3A
2026-02-24T05:02:02.687000
Space Weather Message Code: ALTEF3 Serial Number: 3633 Issue Time: 2026 Feb 24 0502 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3632 Begin Time: 2026 Feb 23 1045 UTC Yesterday Maximum 2MeV Flux: 4958 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
K04W
2026-02-24T11:55:03.900000
Space Weather Message Code: WARK04 Serial Number: 5270 Issue Time: 2026 Feb 24 1155 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5269 Valid From: 2026 Feb 21 2230 UTC Now Valid Until: 2026 Feb 24 2100 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K04W
2026-02-25T01:35:08.567000
Space Weather Message Code: WARK04 Serial Number: 5271 Issue Time: 2026 Feb 25 0135 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2026 Feb 25 0134 UTC Valid To: 2026 Feb 25 0900 UTC Warning Condition: Onset NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K04A
2026-02-25T03:01:35.333000
Space Weather Message Code: ALTK04 Serial Number: 2635 Issue Time: 2026 Feb 25 0301 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2026 Feb 25 0259 UTC Synoptic Period: 0000-0300 UTC Active Warning: Yes NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
ALERT
EF3A
2026-02-25T05:01:28.493000
Space Weather Message Code: ALTEF3 Serial Number: 3634 Issue Time: 2026 Feb 25 0501 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3633 Begin Time: 2026 Feb 23 1045 UTC Yesterday Maximum 2MeV Flux: 13748 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
TIIA
2026-02-25T07:28:41.037000
Space Weather Message Code: ALTTP2 Serial Number: 1468 Issue Time: 2026 Feb 25 0728 UTC ALERT: Type II Radio Emission Begin Time: 2026 Feb 25 0653 UTC Estimated Velocity: 595 km/s Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.
ALERT
K04W
2026-02-25T08:55:28.907000
Space Weather Message Code: WARK04 Serial Number: 5272 Issue Time: 2026 Feb 25 0855 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5271 Valid From: 2026 Feb 25 0134 UTC Now Valid Until: 2026 Feb 25 1800 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K04W
2026-02-25T21:41:09.483000
Space Weather Message Code: WARK04 Serial Number: 5273 Issue Time: 2026 Feb 25 2141 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2026 Feb 25 2140 UTC Valid To: 2026 Feb 26 0300 UTC Warning Condition: Onset NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K04A
2026-02-25T21:47:41.970000
Space Weather Message Code: ALTK04 Serial Number: 2636 Issue Time: 2026 Feb 25 2147 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2026 Feb 25 2147 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
ALERT
K04W
2026-02-26T01:08:45.920000
Space Weather Message Code: WARK04 Serial Number: 5274 Issue Time: 2026 Feb 26 0108 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5273 Valid From: 2026 Feb 25 2140 UTC Now Valid Until: 2026 Feb 26 1200 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K05W
2026-02-26T01:10:04.920000
Space Weather Message Code: WARK05 Serial Number: 2201 Issue Time: 2026 Feb 26 0110 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2026 Feb 26 0109 UTC Valid To: 2026 Feb 26 0900 UTC Warning Condition: Onset NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WARNING
EF3A
2026-02-26T04:59:45.753000
Space Weather Message Code: ALTEF3 Serial Number: 3635 Issue Time: 2026 Feb 26 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3634 Begin Time: 2026 Feb 23 1045 UTC Yesterday Maximum 2MeV Flux: 10494 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
K04W
2026-02-26T11:55:38.020000
Space Weather Message Code: WARK04 Serial Number: 5275 Issue Time: 2026 Feb 26 1155 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5274 Valid From: 2026 Feb 25 2140 UTC Now Valid Until: 2026 Feb 26 1800 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
EF3A
2026-02-27T04:59:48.390000
Space Weather Message Code: ALTEF3 Serial Number: 3636 Issue Time: 2026 Feb 27 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3635 Begin Time: 2026 Feb 23 1045 UTC Yesterday Maximum 2MeV Flux: 7303 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
EF3A
2026-02-28T05:00:21.700000
Space Weather Message Code: ALTEF3 Serial Number: 3637 Issue Time: 2026 Feb 28 0500 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3636 Begin Time: 2026 Feb 23 1045 UTC Yesterday Maximum 2MeV Flux: 11786 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
EF3A
2026-03-01T05:09:27.530000
Space Weather Message Code: ALTEF3 Serial Number: 3638 Issue Time: 2026 Mar 01 0509 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3637 Begin Time: 2026 Feb 23 1045 UTC Yesterday Maximum 2MeV Flux: 7143 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
EF3A
2026-03-02T05:00:13.617000
Space Weather Message Code: ALTEF3 Serial Number: 3639 Issue Time: 2026 Mar 02 0500 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3638 Begin Time: 2026 Feb 23 1045 UTC Yesterday Maximum 2MeV Flux: 7042 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
EF3A
2026-03-03T13:41:47.313000
Space Weather Message Code: ALTEF3 Serial Number: 3640 Issue Time: 2026 Mar 03 1341 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3639 Begin Time: 2026 Feb 23 1045 UTC Yesterday Maximum 2MeV Flux: 14496 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
K04W
2026-03-03T22:08:18.237000
Space Weather Message Code: WARK04 Serial Number: 5276 Issue Time: 2026 Mar 03 2208 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2026 Mar 03 2208 UTC Valid To: 2026 Mar 04 0600 UTC Warning Condition: Onset NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K04A
2026-03-03T22:28:38.590000
Space Weather Message Code: ALTK04 Serial Number: 2637 Issue Time: 2026 Mar 03 2228 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2026 Mar 03 2228 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
ALERT
K05W
2026-03-03T22:30:25.437000
Space Weather Message Code: WARK05 Serial Number: 2202 Issue Time: 2026 Mar 03 2230 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2026 Mar 03 2230 UTC Valid To: 2026 Mar 04 0300 UTC Warning Condition: Onset NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WARNING
K05W
2026-03-03T22:32:24.860000
Space Weather Message Code: WARK05 Serial Number: 2202 Issue Time: 2026 Mar 03 2232 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2026 Mar 03 2230 UTC Valid To: 2026 Mar 04 0300 UTC Warning Condition: Onset NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WARNING
K05A
2026-03-03T22:48:29.190000
Space Weather Message Code: ALTK05 Serial Number: 1971 Issue Time: 2026 Mar 03 2248 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2026 Mar 03 2248 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT
A20F
2026-03-03T23:05:46.217000
Space Weather Message Code: WATA20 Serial Number: 1098 Issue Time: 2026 Mar 03 2305 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Mar 04: None (Below G1) Mar 05: None (Below G1) Mar 06: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WATCH
A20F
2026-03-06T17:53:00.083000
Space Weather Message Code: WATA20 Serial Number: 1099 Issue Time: 2026 Mar 06 1752 UTC CANCEL WATCH: Geomagnetic Storm Category G1 Predicted Cancel Serial Number: 1098 Original Issue Time: 2026 Mar 03 2305 UTC Comment: G1 (Minor) geomagnetic storms are no longer expected. NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WATCH
K04W
2026-03-07T00:26:29.703000
Space Weather Message Code: WARK04 Serial Number: 5277 Issue Time: 2026 Mar 07 0026 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2026 Mar 07 0025 UTC Valid To: 2026 Mar 07 1800 UTC Warning Condition: Onset NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K04A
2026-03-07T02:06:35.610000
Space Weather Message Code: ALTK04 Serial Number: 2638 Issue Time: 2026 Mar 07 0206 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2026 Mar 07 0206 UTC Synoptic Period: 0000-0300 UTC Active Warning: Yes NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
ALERT
K04W
2026-03-07T17:55:31.723000
Space Weather Message Code: WARK04 Serial Number: 5278 Issue Time: 2026 Mar 07 1755 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5277 Valid From: 2026 Mar 07 0025 UTC Now Valid Until: 2026 Mar 08 1800 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K05W
2026-03-08T01:49:30.633000
Space Weather Message Code: WARK05 Serial Number: 2203 Issue Time: 2026 Mar 08 0149 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2026 Mar 08 0149 UTC Valid To: 2026 Mar 08 1500 UTC Warning Condition: Onset NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WARNING
K05A
2026-03-08T02:42:39.477000
Space Weather Message Code: ALTK05 Serial Number: 1972 Issue Time: 2026 Mar 08 0242 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2026 Mar 08 0242 UTC Synoptic Period: 0000-0300 UTC Active Warning: Yes NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT
K05W
2026-03-08T14:55:43.760000
Space Weather Message Code: WARK05 Serial Number: 2204 Issue Time: 2026 Mar 08 1455 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 2203 Valid From: 2026 Mar 08 0149 UTC Now Valid Until: 2026 Mar 08 2359 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WARNING
K04W
2026-03-08T14:58:33.500000
Space Weather Message Code: WARK04 Serial Number: 5279 Issue Time: 2026 Mar 08 1458 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5278 Valid From: 2026 Mar 07 0025 UTC Now Valid Until: 2026 Mar 09 1500 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
EF3A
2026-03-08T15:27:31.083000
Space Weather Message Code: ALTEF3 Serial Number: 3641 Issue Time: 2026 Mar 08 1527 UTC ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2026 Mar 08 1510 UTC Station: GOES19 Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
EF3A
2026-03-09T14:42:43.717000
Space Weather Message Code: ALTEF3 Serial Number: 3642 Issue Time: 2026 Mar 09 1442 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3641 Begin Time: 2026 Mar 08 1510 UTC Yesterday Maximum 2MeV Flux: 2161 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
K04W
2026-03-10T01:09:50.990000
Space Weather Message Code: WARK04 Serial Number: 5280 Issue Time: 2026 Mar 10 0109 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2026 Mar 10 0110 UTC Valid To: 2026 Mar 10 0600 UTC Warning Condition: Onset NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
EF3A
2026-03-10T17:16:14.630000
Space Weather Message Code: ALTEF3 Serial Number: 3643 Issue Time: 2026 Mar 10 1716 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3642 Begin Time: 2026 Mar 08 1510 UTC Yesterday Maximum 2MeV Flux: 1358 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
K04W
2026-03-10T17:52:31.970000
Space Weather Message Code: WARK04 Serial Number: 5281 Issue Time: 2026 Mar 10 1752 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2026 Mar 10 1752 UTC Valid To: 2026 Mar 11 0300 UTC Warning Condition: Onset NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K04A
2026-03-10T18:01:18.303000
Space Weather Message Code: ALTK04 Serial Number: 2639 Issue Time: 2026 Mar 10 1801 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2026 Mar 10 1759 UTC Synoptic Period: 1500-1800 UTC Active Warning: Yes NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
ALERT
K04W
2026-03-11T02:57:03.490000
Space Weather Message Code: WARK04 Serial Number: 5282 Issue Time: 2026 Mar 11 0257 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5281 Valid From: 2026 Mar 10 1752 UTC Now Valid Until: 2026 Mar 11 1200 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
EF3A
2026-03-11T10:04:06.967000
Space Weather Message Code: ALTEF3 Serial Number: 3644 Issue Time: 2026 Mar 11 1004 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3643 Begin Time: 2026 Mar 08 1510 UTC Yesterday Maximum 2MeV Flux: 1726 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
A20F
2026-03-11T21:52:25.427000
Space Weather Message Code: WATA20 Serial Number: 1100 Issue Time: 2026 Mar 11 2152 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Mar 12: None (Below G1) Mar 13: G1 (Minor) Mar 14: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WATCH
EF3A
2026-03-12T11:47:08.050000
Space Weather Message Code: ALTEF3 Serial Number: 3645 Issue Time: 2026 Mar 12 1147 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3644 Begin Time: 2026 Mar 08 1510 UTC Yesterday Maximum 2MeV Flux: 2076 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
K04W
2026-03-13T01:57:16.973000
Space Weather Message Code: WARK04 Serial Number: 5283 Issue Time: 2026 Mar 13 0157 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2026 Mar 13 0156 UTC Valid To: 2026 Mar 13 2359 UTC Warning Condition: Onset NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K04A
2026-03-13T04:54:05.023000
Space Weather Message Code: ALTK04 Serial Number: 2640 Issue Time: 2026 Mar 13 0454 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2026 Mar 13 0447 UTC Synoptic Period: 0300-0600 UTC Active Warning: Yes NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
ALERT
K05W
2026-03-13T11:52:49.423000
Space Weather Message Code: WARK05 Serial Number: 2205 Issue Time: 2026 Mar 13 1152 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2026 Mar 13 1152 UTC Valid To: 2026 Mar 13 1800 UTC Warning Condition: Onset NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WARNING
K05A
2026-03-13T11:59:42.753000
Space Weather Message Code: ALTK05 Serial Number: 1973 Issue Time: 2026 Mar 13 1159 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2026 Mar 13 1159 UTC Synoptic Period: 0900-1200 UTC Active Warning: Yes NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT
EF3A
2026-03-13T17:34:49.767000
Space Weather Message Code: ALTEF3 Serial Number: 3646 Issue Time: 2026 Mar 13 1734 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3645 Begin Time: 2026 Mar 08 1510 UTC Yesterday Maximum 2MeV Flux: 2941 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
K05W
2026-03-13T17:56:14.103000
Space Weather Message Code: WARK05 Serial Number: 2206 Issue Time: 2026 Mar 13 1756 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 2205 Valid From: 2026 Mar 13 1152 UTC Now Valid Until: 2026 Mar 13 2100 UTC Warning Condition: Onset NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WARNING
K04W
2026-03-13T20:58:09.037000
Space Weather Message Code: WARK04 Serial Number: 5284 Issue Time: 2026 Mar 13 2058 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5283 Valid From: 2026 Mar 13 0156 UTC Now Valid Until: 2026 Mar 14 1500 UTC Warning Condition: Onset NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K05W
2026-03-13T20:58:09.063000
Space Weather Message Code: WARK05 Serial Number: 2206 Issue Time: 2026 Mar 13 2058 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 2205 Valid From: 2026 Mar 13 1152 UTC Now Valid Until: 2026 Mar 14 0600 UTC Warning Condition: Persistance NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WARNING
K05A
2026-03-13T23:17:18.430000
Space Weather Message Code: ALTK05 Serial Number: 1974 Issue Time: 2026 Mar 13 2317 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2026 Mar 13 2312 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT
K06W
2026-03-13T23:38:40.287000
Space Weather Message Code: WARK06 Serial Number: 643 Issue Time: 2026 Mar 13 2338 UTC WARNING: Geomagnetic K-Index of 6 expected Valid From: 2026 Mar 13 2338 UTC Valid To: 2026 Mar 14 0600 UTC Warning Condition: Onset NOAA Scale: G2 - Moderate NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
WARNING
K06A
2026-03-13T23:39:45.937000
Space Weather Message Code: ALTK06 Serial Number: 697 Issue Time: 2026 Mar 13 2339 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2026 Mar 13 2340 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Scale: G2 - Moderate NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT
K05A
2026-03-14T00:54:17.610000
Space Weather Message Code: ALTK05 Serial Number: 1975 Issue Time: 2026 Mar 14 0054 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2026 Mar 14 0047 UTC Synoptic Period: 0000-0300 UTC Active Warning: Yes NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT
K06A
2026-03-14T02:01:30.323000
Space Weather Message Code: ALTK06 Serial Number: 698 Issue Time: 2026 Mar 14 0201 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2026 Mar 14 0200 UTC Synoptic Period: 0000-0300 UTC Active Warning: Yes NOAA Scale: G2 - Moderate NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT
K05A
2026-03-14T04:09:38.660000
Space Weather Message Code: ALTK05 Serial Number: 1976 Issue Time: 2026 Mar 14 0409 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2026 Mar 14 0404 UTC Synoptic Period: 0300-0600 UTC Active Warning: Yes NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT
K06W
2026-03-14T05:28:25.743000
Space Weather Message Code: WARK06 Serial Number: 644 Issue Time: 2026 Mar 14 0528 UTC EXTENDED WARNING: Geomagnetic K-Index of 6 expected Extension to Serial Number: 643 Valid From: 2026 Mar 13 2338 UTC Now Valid Until: 2026 Mar 14 1500 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
WARNING
K06A
2026-03-14T05:28:25.750000
Space Weather Message Code: ALTK06 Serial Number: 699 Issue Time: 2026 Mar 14 0528 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2026 Mar 14 0524 UTC Synoptic Period: 0300-0600 UTC Active Warning: Yes NOAA Scale: G2 - Moderate NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT
K05W
2026-03-14T05:42:15.247000
Space Weather Message Code: WARK05 Serial Number: 2207 Issue Time: 2026 Mar 14 0542 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 2206 Valid From: 2026 Mar 13 1152 UTC Now Valid Until: 2026 Mar 14 2100 UTC Warning Condition: Persistance NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WARNING
K04W
2026-03-14T05:43:00.790000
Space Weather Message Code: WARK04 Serial Number: 5285 Issue Time: 2026 Mar 14 0543 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5284 Valid From: 2026 Mar 13 0156 UTC Now Valid Until: 2026 Mar 14 2359 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K05A
2026-03-14T09:00:11.373000
Space Weather Message Code: ALTK05 Serial Number: 1977 Issue Time: 2026 Mar 14 0900 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2026 Mar 14 0859 UTC Synoptic Period: 0600-0900 UTC Active Warning: Yes NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT
K05A
2026-03-14T14:50:21.157000
Space Weather Message Code: ALTK05 Serial Number: 1978 Issue Time: 2026 Mar 14 1450 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2026 Mar 14 1448 UTC Synoptic Period: 1200-1500 UTC Active Warning: Yes NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT
A20F
2026-03-14T17:04:50.790000
Space Weather Message Code: WATA20 Serial Number: 1101 Issue Time: 2026 Mar 14 1704 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Mar 15: G1 (Minor) Mar 16: None (Below G1) Mar 17: None (Below G1) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Comment: G1 (Minor) geomagnetic storming remains likely on 15 Mar due to ongoing CH HSS effects. NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WATCH
K04W
2026-03-14T20:27:00.270000
Space Weather Message Code: WARK04 Serial Number: 5286 Issue Time: 2026 Mar 14 2027 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5285 Valid From: 2026 Mar 13 0156 UTC Now Valid Until: 2026 Mar 15 0900 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K04W
2026-03-15T11:19:18.180000
Space Weather Message Code: WARK04 Serial Number: 5287 Issue Time: 2026 Mar 15 1119 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2026 Mar 15 1119 UTC Valid To: 2026 Mar 15 2100 UTC Warning Condition: Onset NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K04A
2026-03-15T11:22:31.110000
Space Weather Message Code: ALTK04 Serial Number: 2641 Issue Time: 2026 Mar 15 1122 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2026 Mar 15 1122 UTC Synoptic Period: 0900-1200 UTC Active Warning: Yes NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
ALERT
EF3A
2026-03-15T16:45:09.667000
Space Weather Message Code: ALTEF3 Serial Number: 3647 Issue Time: 2026 Mar 15 1645 UTC ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Threshold Reached: 2026 Mar 15 1630 UTC Station: GOES19 Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
K04W
2026-03-15T23:10:08.973000
Space Weather Message Code: WARK04 Serial Number: 5288 Issue Time: 2026 Mar 15 2310 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2026 Mar 15 2309 UTC Valid To: 2026 Mar 16 1200 UTC Warning Condition: Onset NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K04A
2026-03-15T23:14:06.087000
Space Weather Message Code: ALTK04 Serial Number: 2642 Issue Time: 2026 Mar 15 2314 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2026 Mar 15 2300 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
ALERT
K04A
2026-03-15T23:15:10.933000
Space Weather Message Code: ALTK04 Serial Number: 2643 Issue Time: 2026 Mar 15 2315 UTC CANCEL ALERT: Geomagnetic K-index of 4 Cancel Serial Number: 2642 Original Issue Time: 2026 Mar 15 2314 UTC Comment: Incorrectly entered start time. NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
ALERT
K04A
2026-03-15T23:15:54.907000
Space Weather Message Code: ALTK04 Serial Number: 2644 Issue Time: 2026 Mar 15 2315 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2026 Mar 15 2310 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
ALERT
TIIA
2026-03-16T12:24:57.823000
Space Weather Message Code: ALTTP2 Serial Number: 1469 Issue Time: 2026 Mar 16 1224 UTC ALERT: Type II Radio Emission Begin Time: 2026 Mar 16 1209 UTC Estimated Velocity: 1227 km/s Comment: Likely associated with M2.7 flare from AR 4392. Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.
ALERT
TIVA
2026-03-16T12:26:18.087000
Space Weather Message Code: ALTTP4 Serial Number: 705 Issue Time: 2026 Mar 16 1226 UTC ALERT: Type IV Radio Emission Begin Time: 2026 Mar 16 1212 UTC Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.
ALERT
BHIS
2026-03-16T12:29:37.860000
Space Weather Message Code: SUM10R Serial Number: 901 Issue Time: 2026 Mar 16 1229 UTC SUMMARY: 10cm Radio Burst Begin Time: 2026 Mar 16 1209 UTC Maximum Time: 2026 Mar 16 1213 UTC End Time: 2026 Mar 16 1217 UTC Duration: 8 minutes Peak Flux: 380 sfu Latest Penticton Noon Flux: 109 sfu Comment: Associated with M2.7 flare from AR 4392. Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.
SUMMARY
EF3A
2026-03-16T13:20:36.937000
Space Weather Message Code: ALTEF3 Serial Number: 3648 Issue Time: 2026 Mar 16 1320 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3647 Begin Time: 2026 Mar 15 1630 UTC Yesterday Maximum 2MeV Flux: 1429 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
A30F
2026-03-16T20:25:18.200000
Space Weather Message Code: WATA30 Serial Number: 264 Issue Time: 2026 Mar 16 2025 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Mar 17: None (Below G1) Mar 18: None (Below G1) Mar 19: G2 (Moderate) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Comment: G2 (Moderate) geomagnetic storming is likely on 19 Mar with the arrival of the 16 Mar CME event. This event was associated with an M2.7 flare from AR 4392. NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
WATCH
A30F
2026-03-16T21:08:59.560000
Space Weather Message Code: WATA30 Serial Number: 264 Issue Time: 2026 Mar 16 2108 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Mar 17: None (Below G1) Mar 18: None (Below G1) Mar 19: G2 (Moderate) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Comment: G2 (Moderate) geomagnetic storming is likely on 19 Mar with the arrival of a CME that left the Sun on 16 Mar. This is a reissue of the previous watch to correct an internal system error. NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
WATCH
EF3A
2026-03-17T14:03:49.470000
Space Weather Message Code: ALTEF3 Serial Number: 3649 Issue Time: 2026 Mar 17 1403 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3648 Begin Time: 2026 Mar 15 1630 UTC Yesterday Maximum 2MeV Flux: 2213 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
A30F
2026-03-17T18:36:37.167000
Space Weather Message Code: WATA30 Serial Number: 264 Issue Time: 2026 Mar 17 1836 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Mar 18: None (Below G1) Mar 19: G2 (Moderate) Mar 20: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Comment: CME influences are likely on 19 Mar with any effects continuing, but weakening, into 20 Mar. NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
WATCH
EF3A
2026-03-18T04:59:44.273000
Space Weather Message Code: ALTEF3 Serial Number: 3650 Issue Time: 2026 Mar 18 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3649 Begin Time: 2026 Mar 15 1630 UTC Yesterday Maximum 2MeV Flux: 2233 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
TIIA
2026-03-18T08:59:48.527000
Space Weather Message Code: ALTTP2 Serial Number: 1470 Issue Time: 2026 Mar 18 0859 UTC ALERT: Type II Radio Emission Begin Time: 2026 Mar 18 0840 UTC Estimated Velocity: 866 km/s Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.
ALERT
BHIS
2026-03-18T09:03:34.557000
Space Weather Message Code: SUM10R Serial Number: 902 Issue Time: 2026 Mar 18 0903 UTC SUMMARY: 10cm Radio Burst Begin Time: 2026 Mar 18 0833 UTC Maximum Time: 2026 Mar 18 0835 UTC End Time: 2026 Mar 18 0839 UTC Duration: 6 minutes Peak Flux: 229 sfu Latest Penticton Noon Flux: 111 sfu Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.
SUMMARY
A30F
2026-03-18T21:14:07.740000
Space Weather Message Code: WATA30 Serial Number: 265 Issue Time: 2026 Mar 18 2114 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Mar 19: G2 (Moderate) Mar 20: G2 (Moderate) Mar 21: G2 (Moderate) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
WATCH
EF3A
2026-03-19T04:59:20.403000
Space Weather Message Code: ALTEF3 Serial Number: 3651 Issue Time: 2026 Mar 19 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3650 Begin Time: 2026 Mar 15 1630 UTC Yesterday Maximum 2MeV Flux: 2949 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
K04W
2026-03-20T07:18:46.533000
Space Weather Message Code: WARK04 Serial Number: 5289 Issue Time: 2026 Mar 20 0718 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2026 Mar 20 0719 UTC Valid To: 2026 Mar 20 1500 UTC Warning Condition: Onset NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
K04A
2026-03-20T08:54:56.533000
Space Weather Message Code: ALTK04 Serial Number: 2645 Issue Time: 2026 Mar 20 0854 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2026 Mar 20 0854 UTC Synoptic Period: 0600-0900 UTC Active Warning: Yes NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
ALERT
K04W
2026-03-20T12:39:56.870000
Space Weather Message Code: WARK04 Serial Number: 5290 Issue Time: 2026 Mar 20 1239 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5289 Valid From: 2026 Mar 20 0719 UTC Now Valid Until: 2026 Mar 21 1200 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
WARNING
EF3A
2026-03-20T14:55:19.443000
Space Weather Message Code: ALTEF3 Serial Number: 3652 Issue Time: 2026 Mar 20 1455 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3651 Begin Time: 2026 Mar 15 1630 UTC Yesterday Maximum 2MeV Flux: 4941 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
ALERT
K05W
2026-03-20T19:32:04.137000
Space Weather Message Code: WARK05 Serial Number: 2208 Issue Time: 2026 Mar 20 1932 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2026 Mar 20 1930 UTC Valid To: 2026 Mar 21 0900 UTC Warning Condition: Onset NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
WARNING
K05A
2026-03-20T20:18:58.940000
Space Weather Message Code: ALTK05 Serial Number: 1979 Issue Time: 2026 Mar 20 2018 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2026 Mar 20 2018 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT
K06W
2026-03-20T20:22:56.357000
Space Weather Message Code: WARK06 Serial Number: 645 Issue Time: 2026 Mar 20 2022 UTC WARNING: Geomagnetic K-Index of 6 expected Valid From: 2026 Mar 20 2020 UTC Valid To: 2026 Mar 21 0600 UTC Warning Condition: Onset NOAA Scale: G2 - Moderate Comment: G2 (Moderate) geomagnetic storm conditions are expected into the the early portions of 21 Mar (UTC) due to CME effects. NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
WARNING
SGIW
2026-03-20T20:40:35.003000
Space Weather Message Code: WARSUD Serial Number: 251 Issue Time: 2026 Mar 20 2040 UTC WARNING: Geomagnetic Sudden Impulse expected Valid From: 2026 Mar 20 2050 UTC Valid To: 2026 Mar 20 2120 UTC IP Shock Passage Observed: 2026 Mar 20 2118 UTC NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation
WARNING
A50F
2026-03-20T20:43:58.600000
Space Weather Message Code: WATA50 Serial Number: 96 Issue Time: 2026 Mar 20 2043 UTC WATCH: Geomagnetic Storm Category G3 Predicted Highest Storm Level Predicted by Day: Mar 20: G3 (Strong) Mar 21: G3 (Strong) Mar 22: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Comment: G3 (Strong) geomagnetic storming is likely due to combined CME effects from events that left the Sun on 16 and 18 Mar. NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude. Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices. Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur. Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur. Radio - HF (high frequency) radio may be intermittent. Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
WATCH
K06A
2026-03-20T21:04:30.617000
Space Weather Message Code: ALTK06 Serial Number: 700 Issue Time: 2026 Mar 20 2104 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2026 Mar 20 2059 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G2 - Moderate NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT
MSIS
2026-03-20T21:09:53.620000
Space Weather Message Code: SUMSUD Serial Number: 296 Issue Time: 2026 Mar 20 2109 UTC SUMMARY: Geomagnetic Sudden Impulse Observed: 2026 Mar 20 2053 UTC Deviation: 56 nT Station: BOU NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation
SUMMARY
K05A
2026-03-20T21:36:31.443000
Space Weather Message Code: ALTK05 Serial Number: 1980 Issue Time: 2026 Mar 20 2136 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2026 Mar 20 2126 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
ALERT
K06A
2026-03-20T22:12:22.787000
Space Weather Message Code: ALTK06 Serial Number: 701 Issue Time: 2026 Mar 20 2212 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2026 Mar 20 2208 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Scale: G2 - Moderate NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
ALERT
K07W
2026-03-20T23:05:56.793000
Space Weather Message Code: WARK07 Serial Number: 145 Issue Time: 2026 Mar 20 2305 UTC WARNING: Geomagnetic K-index of 7 or greater expected Valid From: 2026 Mar 20 2305 UTC Valid To: 2026 Mar 21 0600 UTC Warning Condition: Onset NOAA Scale: G3 or greater NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude. Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices. Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur. Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur. Radio - HF (high frequency) radio may be intermittent. Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
WARNING