Local 4/2/2026, 8:52:06 PM
UTC 2026-04-02T20:52:06.767Z
Space Weather Message Code: ALTK05Serial Number: 2001Issue Time: 2026 Apr 02 2052 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Apr 02 2052 UTCSynoptic Period: 1800-2100 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 4/2/2026, 5:43:18 PM
UTC 2026-04-02T17:43:18.647Z
Space Weather Message Code: WATA30Serial Number: 270Issue Time: 2026 Apr 02 1743 UTCWATCH: Geomagnetic Storm Category G2 PredictedHighest Storm Level Predicted by Day:Apr 02: G2 (Moderate) Apr 03: G2 (Moderate) Apr 04: G2 (Moderate)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 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.
Local 4/2/2026, 5:11:41 PM
UTC 2026-04-02T17:11:41.030Z
Space Weather Message Code: ALTK06Serial Number: 709Issue Time: 2026 Apr 02 1711 UTCALERT: Geomagnetic K-index of 6Threshold Reached: 2026 Apr 02 1705 UTCSynoptic Period: 1500-1800 UTCActive Warning: YesNOAA Scale: G2 - ModerateNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 4/2/2026, 5:11:41 PM
UTC 2026-04-02T17:11:41.010Z
Space Weather Message Code: WARK04Serial Number: 5309Issue Time: 2026 Apr 02 1711 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5308Valid From: 2026 Apr 02 0047 UTCNow Valid Until: 2026 Apr 03 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 4/2/2026, 5:11:40 PM
UTC 2026-04-02T17:11:40.987Z
Space Weather Message Code: WARK05Serial Number: 2220Issue Time: 2026 Apr 02 1711 UTCEXTENDED WARNING: Geomagnetic K-index of 5 expectedExtension to Serial Number: 2219Valid From: 2026 Apr 02 0230 UTCNow Valid Until: 2026 Apr 03 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 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 4/2/2026, 5:11:40 PM
UTC 2026-04-02T17:11:40.963Z
Space Weather Message Code: WARK06Serial Number: 651Issue Time: 2026 Apr 02 1711 UTCEXTENDED WARNING: Geomagnetic K-Index of 6 expectedExtension to Serial Number: 650Valid From: 2026 Apr 02 0753 UTCNow Valid Until: 2026 Apr 03 0900 UTCWarning Condition: PersistenceNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 4/2/2026, 4:29:02 PM
UTC 2026-04-02T16:29:02.380Z
Space Weather Message Code: ALTK05Serial Number: 2000Issue Time: 2026 Apr 02 1629 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Apr 02 1627 UTCSynoptic Period: 1500-1800 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 4/2/2026, 2:32:31 PM
UTC 2026-04-02T14:32:31.447Z
Space Weather Message Code: ALTK05Serial Number: 1999Issue Time: 2026 Apr 02 1432 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Apr 02 1430 UTCSynoptic Period: 1200-1500 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 4/2/2026, 10:22:03 AM
UTC 2026-04-02T10:22:03.600Z
Space Weather Message Code: ALTK05Serial Number: 1998Issue Time: 2026 Apr 02 1022 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Apr 02 1021 UTCSynoptic Period: 0900-1200 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 4/2/2026, 7:53:29 AM
UTC 2026-04-02T07:53:29.083Z
Space Weather Message Code: WARK05Serial Number: 2219Issue Time: 2026 Apr 02 0753 UTCEXTENDED WARNING: Geomagnetic K-index of 5 expectedExtension to Serial Number: 2218Valid From: 2026 Apr 02 0230 UTCNow Valid Until: 2026 Apr 02 1800 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 4/2/2026, 7:53:29 AM
UTC 2026-04-02T07:53:29.053Z
Space Weather Message Code: WARK06Serial Number: 650Issue Time: 2026 Apr 02 0753 UTCWARNING: Geomagnetic K-Index of 6 expectedValid From: 2026 Apr 02 0753 UTCValid To: 2026 Apr 02 1800 UTCWarning Condition: OnsetNOAA Scale: G2 - ModerateNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 4/2/2026, 7:51:14 AM
UTC 2026-04-02T07:51:14.570Z
Space Weather Message Code: WARK04Serial Number: 5308Issue Time: 2026 Apr 02 0751 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5307Valid From: 2026 Apr 02 0047 UTCNow Valid Until: 2026 Apr 02 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 4/2/2026, 7:50:25 AM
UTC 2026-04-02T07:50:25.067Z
Space Weather Message Code: ALTK05Serial Number: 1997Issue Time: 2026 Apr 02 0750 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Apr 02 0750 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 4/2/2026, 3:01:02 AM
UTC 2026-04-02T03:01:02.073Z
Space Weather Message Code: ALTK05Serial Number: 1996Issue Time: 2026 Apr 02 0301 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Apr 02 0300 UTCSynoptic Period: 0000-0300 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 4/2/2026, 2:30:26 AM
UTC 2026-04-02T02:30:26.507Z
Space Weather Message Code: WARK05Serial Number: 2218Issue Time: 2026 Apr 02 0230 UTCWARNING: Geomagnetic K-index of 5 expectedValid From: 2026 Apr 02 0230 UTCValid To: 2026 Apr 02 0900 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 4/2/2026, 2:20:22 AM
UTC 2026-04-02T02:20:22.237Z
Space Weather Message Code: ALTK04Serial Number: 2648Issue Time: 2026 Apr 02 0220 UTCALERT: Geomagnetic K-index of 4Threshold Reached: 2026 Apr 02 0220 UTCSynoptic Period: 0000-0300 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 4/2/2026, 12:47:54 AM
UTC 2026-04-02T00:47:54.683Z
Space Weather Message Code: WARK04Serial Number: 5307Issue Time: 2026 Apr 02 0047 UTCWARNING: Geomagnetic K-index of 4 expectedValid From: 2026 Apr 02 0047 UTCValid To: 2026 Apr 02 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 4/1/2026, 11:35:19 PM
UTC 2026-04-01T23:35:19.690Z
Space Weather Message Code: ALTTP2Serial Number: 1474Issue Time: 2026 Apr 01 2335 UTCALERT: Type II Radio EmissionBegin Time: 2026 Apr 01 2303 UTCEstimated Velocity: 58 km/sDescription: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.
Local 4/1/2026, 1:30:37 PM
UTC 2026-04-01T13:30:37.470Z
Space Weather Message Code: ALTEF3Serial Number: 3663Issue Time: 2026 Apr 01 1330 UTCCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfuContinuation of Serial Number: 3662Begin Time: 2026 Mar 22 1430 UTCYesterday Maximum 2MeV Flux: 1413 pfuPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 4/1/2026, 12:33:06 PM
UTC 2026-04-01T12:33:06.823Z
Space Weather Message Code: SUMSUDSerial Number: 297Issue Time: 2026 Apr 01 1233 UTCSUMMARY: Geomagnetic Sudden ImpulseObserved: 2026 Apr 01 1206 UTCDeviation: 19 nTStation: HADNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanation
Local 4/1/2026, 12:10:32 PM
UTC 2026-04-01T12:10:32.543Z
Space Weather Message Code: WARK04Serial Number: 5306Issue Time: 2026 Apr 01 1210 UTCWARNING: Geomagnetic K-index of 4 expectedValid From: 2026 Apr 01 1210 UTCValid To: 2026 Apr 01 2359 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 4/1/2026, 11:39:09 AM
UTC 2026-04-01T11:39:09.937Z
Space Weather Message Code: WARSUDSerial Number: 252Issue Time: 2026 Apr 01 1139 UTCWARNING: Geomagnetic Sudden Impulse expectedValid From: 2026 Apr 01 1206 UTCValid To: 2026 Apr 01 1236 UTCIP Shock Passage Observed: 2026 Apr 01 1130 UTCNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanation