Latest Alerts

1. ALERT: Electron 2MeV Integral Flux exceeded 1000pfu EF3A

   Local time: 5/2/2025, 1:44:02 PM / UTC: 2025-05-02T13:44:02.937Z

   Space Weather Message Code: ALTEF3

   Serial Number: 3456

   Issue Time: 2025 May 02 1344 UTC

   ALERT: Electron 2MeV Integral Flux exceeded 1000pfu

   Threshold Reached: 2025 May 02 1330 UTC

   Station: GOES19

   Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

1. K05WK05W

   Local time: 5/2/2025, 8:31:07 AM / UTC: 2025-05-02T08:31:07.480Z

   Space Weather Message Code: WARK05

   Serial Number: 2029

   Issue Time: 2025 May 02 0831 UTC

   EXTENDED WARNING: Geomagnetic K-index of 5 expected

   Extension to Serial Number: 2028

   Valid From: 2025 May 01 1350 UTC

   Now Valid Until: 2025 May 02 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 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.

1. K04WK04W

   Local time: 5/2/2025, 8:30:36 AM / UTC: 2025-05-02T08:30:36.323Z

   Space Weather Message Code: WARK04

   Serial Number: 4946

   Issue Time: 2025 May 02 0830 UTC

   EXTENDED WARNING: Geomagnetic K-index of 4 expected

   Extension to Serial Number: 4945

   Valid From: 2025 May 01 0343 UTC

   Now Valid Until: 2025 May 02 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.

1. ALERT: Geomagnetic K-index of 5 K05A

   Local time: 5/2/2025, 5:07:58 AM / UTC: 2025-05-02T05:07:58.310Z

   Space Weather Message Code: ALTK05

   Serial Number: 1760

   Issue Time: 2025 May 02 0507 UTC

   ALERT: Geomagnetic K-index of 5

   Threshold Reached: 2025 May 02 0459 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.

1. WARNING: Geomagnetic K-Index of 6 expected K06W

   Local time: 5/2/2025, 2:06:20 AM / UTC: 2025-05-02T02:06:20.970Z

   Space Weather Message Code: WARK06

   Serial Number: 578

   Issue Time: 2025 May 02 0206 UTC

   WARNING: Geomagnetic K-Index of 6 expected

   Valid From: 2025 May 02 0206 UTC

   Valid To: 2025 May 02 0900 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.

1. ALERT: Geomagnetic K-index of 5 K05A

   Local time: 5/2/2025, 1:55:31 AM / UTC: 2025-05-02T01:55:31.580Z

   Space Weather Message Code: ALTK05

   Serial Number: 1759

   Issue Time: 2025 May 02 0155 UTC

   ALERT: Geomagnetic K-index of 5

   Threshold Reached: 2025 May 02 0155 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.

1. K04WK04W

   Local time: 5/1/2025, 11:53:29 PM / UTC: 2025-05-01T23:53:29.873Z

   Space Weather Message Code: WARK04

   Serial Number: 4945

   Issue Time: 2025 May 01 2353 UTC

   EXTENDED WARNING: Geomagnetic K-index of 4 expected

   Extension to Serial Number: 4944

   Valid From: 2025 May 01 0343 UTC

   Now Valid Until: 2025 May 02 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.

1. K05WK05W

   Local time: 5/1/2025, 11:48:03 PM / UTC: 2025-05-01T23:48:03.937Z

   Space Weather Message Code: WARK05

   Serial Number: 2028

   Issue Time: 2025 May 01 2348 UTC

   EXTENDED WARNING: Geomagnetic K-index of 5 expected

   Extension to Serial Number: 2027

   Valid From: 2025 May 01 1350 UTC

   Now Valid Until: 2025 May 02 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 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.

1. ALERT: Geomagnetic K-index of 5 K05A

   Local time: 5/1/2025, 11:40:03 PM / UTC: 2025-05-01T23:40:03.590Z

   Space Weather Message Code: ALTK05

   Serial Number: 1758

   Issue Time: 2025 May 01 2340 UTC

   ALERT: Geomagnetic K-index of 5

   Threshold Reached: 2025 May 01 2339 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.

1. ALERT: Geomagnetic K-index of 5 K05A

   Local time: 5/1/2025, 8:23:19 PM / UTC: 2025-05-01T20:23:19.120Z

   Space Weather Message Code: ALTK05

   Serial Number: 1757

   Issue Time: 2025 May 01 2023 UTC

   ALERT: Geomagnetic K-index of 5

   Threshold Reached: 2025 May 01 2022 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.

1. A20FA20F

   Local time: 5/1/2025, 5:50:19 PM / UTC: 2025-05-01T17:50:19.637Z

   Space Weather Message Code: WATA20

   Serial Number: 1037

   Issue Time: 2025 May 01 1750 UTC

   WATCH: Geomagnetic Storm Category G1 Predicted

   Highest Storm Level Predicted by Day:

   May 02: G1 (Minor) May 03: None (Below G1) May 04: None (Below G1)

   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.

1. K04WK04W

   Local time: 5/1/2025, 1:52:03 PM / UTC: 2025-05-01T13:52:03.443Z

   Space Weather Message Code: WARK04

   Serial Number: 4944

   Issue Time: 2025 May 01 1352 UTC

   EXTENDED WARNING: Geomagnetic K-index of 4 expected

   Extension to Serial Number: 4943

   Valid From: 2025 May 01 0343 UTC

   Now Valid Until: 2025 May 02 0600 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.

1. WARNING: Geomagnetic K-index of 5 expected K05W

   Local time: 5/1/2025, 1:52:03 PM / UTC: 2025-05-01T13:52:03.427Z

   Space Weather Message Code: WARK05

   Serial Number: 2027

   Issue Time: 2025 May 01 1352 UTC

   WARNING: Geomagnetic K-index of 5 expected

   Valid From: 2025 May 01 1350 UTC

   Valid To: 2025 May 01 2359 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.

1. K04WK04W

   Local time: 5/1/2025, 10:40:41 AM / UTC: 2025-05-01T10:40:41.270Z

   Space Weather Message Code: WARK04

   Serial Number: 4943

   Issue Time: 2025 May 01 1040 UTC

   EXTENDED WARNING: Geomagnetic K-index of 4 expected

   Extension to Serial Number: 4942

   Valid From: 2025 May 01 0343 UTC

   Now Valid Until: 2025 May 01 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.

1. ALERT: Geomagnetic K-index of 4 K04A

   Local time: 5/1/2025, 5:38:29 AM / UTC: 2025-05-01T05:38:29.400Z

   Space Weather Message Code: ALTK04

   Serial Number: 2554

   Issue Time: 2025 May 01 0538 UTC

   ALERT: Geomagnetic K-index of 4

   Threshold Reached: 2025 May 01 0532 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.

1. WARNING: Geomagnetic K-index of 4 expected K04W

   Local time: 5/1/2025, 3:43:51 AM / UTC: 2025-05-01T03:43:51.643Z

   Space Weather Message Code: WARK04

   Serial Number: 4942

   Issue Time: 2025 May 01 0343 UTC

   WARNING: Geomagnetic K-index of 4 expected

   Valid From: 2025 May 01 0343 UTC

   Valid To: 2025 May 01 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.