Local 3/25/2026, 3:58:47 PM
UTC 2026-03-25T15:58:47.967Z
Space Weather Message Code: WATA20Serial Number: 1102Issue Time: 2026 Mar 25 1558 UTCWATCH: Geomagnetic Storm Category G1 PredictedHighest Storm Level Predicted by Day:Mar 26: G1 (Minor) Mar 27: None (Below G1) Mar 28: None (Below G1)THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECTNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/25/2026, 8:26:18 AM
UTC 2026-03-25T08:26:18.870Z
Space Weather Message Code: ALTK05Serial Number: 1995Issue Time: 2026 Mar 25 0826 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Mar 25 0826 UTCSynoptic Period: 0600-0900 UTCActive Warning: YesNOAA Scale: G1 - MinorNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/25/2026, 8:23:28 AM
UTC 2026-03-25T08:23:28.307Z
Space Weather Message Code: WARK04Serial Number: 5301Issue Time: 2026 Mar 25 0823 UTCWARNING: Geomagnetic K-index of 4 expectedValid From: 2026 Mar 25 0820 UTCValid To: 2026 Mar 25 1500 UTCWarning Condition: PersistenceComment: Correction of the previous extension that was cancelled due to incorrect date.NOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/25/2026, 8:22:25 AM
UTC 2026-03-25T08:22:25.880Z
Space Weather Message Code: WARK04Serial Number: 5300Issue Time: 2026 Mar 25 0822 UTCCANCEL WARNING: Geomagnetic K-index of 4 expectedCancel Serial Number: 5299Original Issue Time: 2026 Mar 25 0440 UTCComment: Wrong date in the Valid Until field.NOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/25/2026, 8:06:01 AM
UTC 2026-03-25T08:06:01.660Z
Space Weather Message Code: WARK04Serial Number: 5299Issue Time: 2026 Mar 25 0806 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5298Valid From: 2026 Mar 25 0440 UTCNow Valid Until: 2025 Mar 26 1500 UTCWarning Condition: PersistenceNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/25/2026, 8:05:39 AM
UTC 2026-03-25T08:05:39.830Z
Space Weather Message Code: WARK05Serial Number: 2217Issue Time: 2026 Mar 25 0805 UTCWARNING: Geomagnetic K-index of 5 expectedValid From: 2026 Mar 25 0805 UTCValid To: 2026 Mar 25 1200 UTCWarning Condition: OnsetNOAA Scale: G1 - MinorNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/25/2026, 8:05:01 AM
UTC 2026-03-25T08:05:01.833Z
Space Weather Message Code: ALTK04Serial Number: 2646Issue Time: 2026 Mar 25 0805 UTCALERT: Geomagnetic K-index of 4Threshold Reached: 2026 Mar 25 0805 UTCSynoptic Period: 0600-0900 UTCActive Warning: YesNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/25/2026, 4:59:21 AM
UTC 2026-03-25T04:59:21.727Z
Space Weather Message Code: ALTEF3Serial Number: 3656Issue Time: 2026 Mar 25 0459 UTCCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfuContinuation of Serial Number: 3655Begin Time: 2026 Mar 22 1430 UTCYesterday Maximum 2MeV Flux: 11907 pfuPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 3/25/2026, 4:40:29 AM
UTC 2026-03-25T04:40:29.680Z
Space Weather Message Code: WARK04Serial Number: 5298Issue Time: 2026 Mar 25 0440 UTCWARNING: Geomagnetic K-index of 4 expectedValid From: 2026 Mar 25 0440 UTCValid To: 2026 Mar 25 0900 UTCWarning Condition: OnsetNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/24/2026, 5:00:10 AM
UTC 2026-03-24T05:00:10.860Z
Space Weather Message Code: ALTEF3Serial Number: 3655Issue Time: 2026 Mar 24 0500 UTCCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfuContinuation of Serial Number: 3654Begin Time: 2026 Mar 22 1430 UTCYesterday Maximum 2MeV Flux: 8285 pfuPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 3/24/2026, 4:20:30 AM
UTC 2026-03-24T04:20:30.377Z
Space Weather Message Code: WARK04Serial Number: 5297Issue Time: 2026 Mar 24 0420 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5296Valid From: 2026 Mar 23 1410 UTCNow Valid Until: 2026 Mar 24 2359 UTCWarning Condition: PersistenceNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/24/2026, 4:20:30 AM
UTC 2026-03-24T04:20:30.370Z
Space Weather Message Code: WARK05Serial Number: 2216Issue Time: 2026 Mar 24 0420 UTCEXTENDED WARNING: Geomagnetic K-index of 5 expectedExtension to Serial Number: 2215Valid From: 2026 Mar 23 1440 UTCNow Valid Until: 2026 Mar 24 1200 UTCWarning Condition: PersistenceNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/23/2026, 8:58:30 PM
UTC 2026-03-23T20:58:30.083Z
Space Weather Message Code: WARK05Serial Number: 2215Issue Time: 2026 Mar 23 2058 UTCEXTENDED WARNING: Geomagnetic K-index of 5 expectedExtension to Serial Number: 2214Valid From: 2026 Mar 23 1440 UTCNow Valid Until: 2026 Mar 24 0600 UTCWarning Condition: PersistenceNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/23/2026, 8:58:30 PM
UTC 2026-03-23T20:58:30.073Z
Space Weather Message Code: WARK04Serial Number: 5296Issue Time: 2026 Mar 23 2058 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5295Valid From: 2026 Mar 23 1410 UTCNow Valid Until: 2026 Mar 24 1200 UTCWarning Condition: OnsetNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.