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.
Local 3/23/2026, 5:52:12 PM
UTC 2026-03-23T17:52:12.777Z
Space Weather Message Code: ALTK05Serial Number: 1994Issue Time: 2026 Mar 23 1752 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Mar 23 1750 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 3/23/2026, 3:00:56 PM
UTC 2026-03-23T15:00:56.463Z
Space Weather Message Code: ALTK05Serial Number: 1993Issue Time: 2026 Mar 23 1500 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Mar 23 1459 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 3/23/2026, 2:41:41 PM
UTC 2026-03-23T14:41:41.290Z
Space Weather Message Code: WARK05Serial Number: 2214Issue Time: 2026 Mar 23 1441 UTCWARNING: Geomagnetic K-index of 5 expectedValid From: 2026 Mar 23 1440 UTCValid To: 2026 Mar 23 2359 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 3/23/2026, 2:13:52 PM
UTC 2026-03-23T14:13:52.720Z
Space Weather Message Code: WARK04Serial Number: 5295Issue Time: 2026 Mar 23 1413 UTCWARNING: Geomagnetic K-index of 4 expectedValid From: 2026 Mar 23 1410 UTCValid To: 2026 Mar 24 0300 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 3/23/2026, 12:01:41 PM
UTC 2026-03-23T12:01:41.367Z
Space Weather Message Code: ALTEF3Serial Number: 3654Issue Time: 2026 Mar 23 1201 UTCCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfuContinuation of Serial Number: 3653Begin Time: 2026 Mar 22 1430 UTCYesterday Maximum 2MeV Flux: 1321 pfuPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 3/23/2026, 1:07:46 AM
UTC 2026-03-23T01:07:46.737Z
Space Weather Message Code: ALTK05Serial Number: 1992Issue Time: 2026 Mar 23 0107 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Mar 23 0105 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 3/22/2026, 11:43:34 PM
UTC 2026-03-22T23:43:34.870Z
Space Weather Message Code: WARK06Serial Number: 649Issue Time: 2026 Mar 22 2343 UTCEXTENDED WARNING: Geomagnetic K-Index of 6 expectedExtension to Serial Number: 648Valid From: 2026 Mar 22 1020 UTCNow Valid Until: 2026 Mar 23 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 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 3/22/2026, 11:39:29 PM
UTC 2026-03-22T23:39:29.363Z
Space Weather Message Code: ALTK05Serial Number: 1991Issue Time: 2026 Mar 22 2339 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Mar 22 2330 UTCSynoptic Period: 2100-2400 UTCActive Warning: YesNOAA Scale: G1 - MinorComment: Corrected the Alert start time.NOAA 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 3/22/2026, 11:37:25 PM
UTC 2026-03-22T23:37:25.067Z
Space Weather Message Code: ALTK06Serial Number: 708Issue Time: 2026 Mar 22 2337 UTCALERT: Geomagnetic K-index of 6Threshold Reached: 2026 Mar 22 2335 UTCSynoptic Period: 2100-2400 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 3/22/2026, 11:31:27 PM
UTC 2026-03-22T23:31:27.823Z
Space Weather Message Code: ALTK05Serial Number: 1990Issue Time: 2026 Mar 22 2331 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Mar 22 1730 UTCSynoptic Period: 2100-2400 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 3/22/2026, 8:34:52 PM
UTC 2026-03-22T20:34:52.833Z
Space Weather Message Code: WATA30Serial Number: 267Issue Time: 2026 Mar 22 2034 UTCWATCH: Geomagnetic Storm Category G2 PredictedHighest Storm Level Predicted by Day:Mar 23: G2 (Moderate) Mar 24: None (Below G1) Mar 25: None (Below G1)THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECTComment: G2 (Moderate) geomagnetic storming is likely on 23 Mar, particularly during the early portions of the UTC-day.NOAA 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 3/22/2026, 8:03:04 PM
UTC 2026-03-22T20:03:04.650Z
Space Weather Message Code: ALTK06Serial Number: 707Issue Time: 2026 Mar 22 2003 UTCALERT: Geomagnetic K-index of 6Threshold Reached: 2026 Mar 22 1953 UTCSynoptic Period: 1800-2100 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 3/22/2026, 7:37:27 PM
UTC 2026-03-22T19:37:27.853Z
Space Weather Message Code: ALTK05Serial Number: 1989Issue Time: 2026 Mar 22 1937 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Mar 22 1929 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 3/22/2026, 6:05:14 PM
UTC 2026-03-22T18:05:14.640Z
Space Weather Message Code: ALTK07Serial Number: 215Issue Time: 2026 Mar 22 1805 UTCALERT: Geomagnetic K-index of 7Threshold Reached: 2026 Mar 22 1759 UTCSynoptic Period: 1500-1800 UTCActive Warning: YesNOAA Scale: G3 - StrongNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/22/2026, 4:17:28 PM
UTC 2026-03-22T16:17:28.790Z
Space Weather Message Code: WARK04Serial Number: 5294Issue Time: 2026 Mar 22 1617 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5293Valid From: 2026 Mar 20 0719 UTCNow Valid Until: 2026 Mar 23 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 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 3/22/2026, 4:15:53 PM
UTC 2026-03-22T16:15:53.820Z
Space Weather Message Code: WARK05Serial Number: 2213Issue Time: 2026 Mar 22 1615 UTCEXTENDED WARNING: Geomagnetic K-index of 5 expectedExtension to Serial Number: 2212Valid From: 2026 Mar 20 1930 UTCNow Valid Until: 2026 Mar 23 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 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 3/22/2026, 4:14:37 PM
UTC 2026-03-22T16:14:37.380Z
Space Weather Message Code: WARK05Serial Number: 2212Issue Time: 2026 Mar 22 1614 UTCEXTENDED WARNING: Geomagnetic K-index of 5 expectedExtension to Serial Number: 2211Valid From: 2026 Mar 20 1930 UTCNow Valid Until: 2026 Mar 22 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 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 3/22/2026, 4:12:30 PM
UTC 2026-03-22T16:12:30.057Z
Space Weather Message Code: WARK06Serial Number: 648Issue Time: 2026 Mar 22 1612 UTCEXTENDED WARNING: Geomagnetic K-Index of 6 expectedExtension to Serial Number: 647Valid From: 2026 Mar 22 1020 UTCNow Valid Until: 2026 Mar 22 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 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 3/22/2026, 4:11:11 PM
UTC 2026-03-22T16:11:11.707Z
Space Weather Message Code: WARK07Serial Number: 147Issue Time: 2026 Mar 22 1611 UTCWARNING: Geomagnetic K-index of 7 or greater expectedValid From: 2026 Mar 22 1609 UTCValid To: 2026 Mar 22 2359 UTCWarning Condition: OnsetNOAA Scale: G3 or greaterNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/22/2026, 4:06:48 PM
UTC 2026-03-22T16:06:48.133Z
Space Weather Message Code: ALTK06Serial Number: 706Issue Time: 2026 Mar 22 1606 UTCALERT: Geomagnetic K-index of 6Threshold Reached: 2026 Mar 22 1559 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 3/22/2026, 4:03:20 PM
UTC 2026-03-22T16:03:20.717Z
Space Weather Message Code: ALTK05Serial Number: 1988Issue Time: 2026 Mar 22 1603 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Mar 22 1553 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 3/22/2026, 2:51:58 PM
UTC 2026-03-22T14:51:58.313Z
Space Weather Message Code: ALTK06Serial Number: 705Issue Time: 2026 Mar 22 1451 UTCALERT: Geomagnetic K-index of 6Threshold Reached: 2026 Mar 22 1448 UTCSynoptic Period: 1200-1500 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 3/22/2026, 2:38:25 PM
UTC 2026-03-22T14:38:25.160Z
Space Weather Message Code: ALTEF3Serial Number: 3653Issue Time: 2026 Mar 22 1438 UTCALERT: Electron 2MeV Integral Flux exceeded 1000pfuThreshold Reached: 2026 Mar 22 1430 UTCStation: GOES19Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 3/22/2026, 1:10:49 PM
UTC 2026-03-22T13:10:49.177Z
Space Weather Message Code: ALTK05Serial Number: 1987Issue Time: 2026 Mar 22 1310 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Mar 22 1306 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 3/22/2026, 10:43:10 AM
UTC 2026-03-22T10:43:10.043Z
Space Weather Message Code: ALTK07Serial Number: 214Issue Time: 2026 Mar 22 1043 UTCALERT: Geomagnetic K-index of 7Threshold Reached: 2026 Mar 22 1042 UTCSynoptic Period: 0900-1200 UTCActive Warning: YesNOAA Scale: G3 - StrongNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/22/2026, 10:42:27 AM
UTC 2026-03-22T10:42:27.220Z
Space Weather Message Code: WARK07Serial Number: 146Issue Time: 2026 Mar 22 1042 UTCWARNING: Geomagnetic K-index of 7 or greater expectedValid From: 2026 Mar 22 1041 UTCValid To: 2026 Mar 22 1500 UTCWarning Condition: OnsetNOAA Scale: G3 or greaterNOAA Space Weather Scale descriptions can be found atwww.swpc.noaa.gov/noaa-scales-explanationPotential 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.
Local 3/22/2026, 10:26:40 AM
UTC 2026-03-22T10:26:40.000Z
Space Weather Message Code: ALTK06Serial Number: 704Issue Time: 2026 Mar 22 1026 UTCALERT: Geomagnetic K-index of 6Threshold Reached: 2026 Mar 22 1026 UTCSynoptic Period: 0900-1200 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 3/22/2026, 10:24:03 AM
UTC 2026-03-22T10:24:03.347Z
Space Weather Message Code: WARK06Serial Number: 647Issue Time: 2026 Mar 22 1024 UTCWARNING: Geomagnetic K-Index of 6 expectedValid From: 2026 Mar 22 1020 UTCValid To: 2026 Mar 22 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 3/22/2026, 9:53:22 AM
UTC 2026-03-22T09:53:22.207Z
Space Weather Message Code: ALTK05Serial Number: 1986Issue Time: 2026 Mar 22 0953 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Mar 22 0953 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 3/22/2026, 8:45:57 AM
UTC 2026-03-22T08:45:57.260Z
Space Weather Message Code: ALTK05Serial Number: 1985Issue Time: 2026 Mar 22 0845 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Mar 22 0845 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 3/22/2026, 5:25:52 AM
UTC 2026-03-22T05:25:52.580Z
Space Weather Message Code: ALTK05Serial Number: 1984Issue Time: 2026 Mar 22 0525 UTCALERT: Geomagnetic K-index of 5Threshold Reached: 2026 Mar 22 0525 UTCSynoptic Period: 0300-0600 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 3/22/2026, 5:14:17 AM
UTC 2026-03-22T05:14:17.543Z
Space Weather Message Code: WARK05Serial Number: 2211Issue Time: 2026 Mar 22 0514 UTCEXTENDED WARNING: Geomagnetic K-index of 5 expectedExtension to Serial Number: 2210Valid From: 2026 Mar 20 1930 UTCNow Valid Until: 2026 Mar 22 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 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 3/22/2026, 5:13:30 AM
UTC 2026-03-22T05:13:30.400Z
Space Weather Message Code: WARK04Serial Number: 5293Issue Time: 2026 Mar 22 0513 UTCEXTENDED WARNING: Geomagnetic K-index of 4 expectedExtension to Serial Number: 5292Valid From: 2026 Mar 20 0719 UTCNow Valid Until: 2026 Mar 22 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.