Local 3/28/2026, 4:32:11 PM
UTC 2026-03-28T16:32:11.980Z
Space Weather Message Code: WATA20Serial Number: 1103Issue Time: 2026 Mar 28 1632 UTCWATCH: Geomagnetic Storm Category G1 PredictedHighest Storm Level Predicted by Day:Mar 29: None (Below G1) Mar 30: G1 (Minor) Mar 31: None (Below G1)THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECTComment: Isolated periods of G1 (Minor) geomagnetic storming are likely on 30 Mar due to CH HSS effects.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 3/28/2026, 2:55:23 PM
UTC 2026-03-28T14:55:23.973Z
Space Weather Message Code: ALTEF3Serial Number: 3659Issue Time: 2026 Mar 28 1455 UTCCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfuContinuation of Serial Number: 3658Begin Time: 2026 Mar 22 1430 UTCYesterday Maximum 2MeV Flux: 12785 pfuPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
Local 3/28/2026, 8:08:35 AM
UTC 2026-03-28T08:08:35.083Z
Space Weather Message Code: ALTTP2Serial Number: 1472Issue Time: 2026 Mar 28 0808 UTCALERT: Type II Radio EmissionBegin Time: 2026 Mar 28 0736 UTCEstimated Velocity: 868 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 3/28/2026, 2:18:47 AM
UTC 2026-03-28T02:18:47.853Z
Space Weather Message Code: WARK04Serial Number: 5302Issue Time: 2026 Mar 28 0218 UTCWARNING: Geomagnetic K-index of 4 expectedValid From: 2026 Mar 28 0218 UTCValid To: 2026 Mar 28 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 3/27/2026, 5:00:11 AM
UTC 2026-03-27T05:00:11.140Z
Space Weather Message Code: ALTEF3Serial Number: 3658Issue Time: 2026 Mar 27 0500 UTCCONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfuContinuation of Serial Number: 3657Begin Time: 2026 Mar 22 1430 UTCYesterday Maximum 2MeV Flux: 11382 pfuPotential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.