Sweltering heat remains across the South-Central Plains and Lower/Middle Mississippi Valley, as well as in the Southwest and California this week with limited nighttime relief. Heavy rainfall will lead to localized areas of flash flooding in parts of the Ohio Valley/Central Appalachians. Dry and breezy conditions will enhance fire weather concerns across the northern Rockies and High Plains. Read More >
Plaese go to the Space Weather Prediction Center for more information.
Items in grey italics apparently are older than 24 hours
831
WOXX21 KWNP 092106
WATA30
Space Weather Message Code: WATA30
Serial Number: 282
Issue Time: 2026 Sep 09 2101 UTC
CANCEL WATCH: Geomagnetic Storm Category G2 Predicted
Cancel Serial Number: 281
Original Issue Time: 2026 Sep 08 1702 UTC
Cancelled Level Predicted:
Sep 08 : None (Bellow G1) Sep 09 : None (Bellow G1) Sep 10 : None (Bellow G1)
Conditions no longer warrant watch criteria.
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.
# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov
093
WOXX13 KWNP 081736
WARK04
Space Weather Message Code: WARK04
Serial Number: 5415
Issue Time: 2026 Sep 08 1730 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5414
Valid From: 2026 Sep 07 0854 UTC
Now Valid Until: 2026 Sep 09 0900 UTC
Warning Condition: Persistence
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.
# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov
173
WOXX11 KWNP 081731
WARK05
Space Weather Message Code: WARK05
Serial Number: 2264
Issue Time: 2026 Sep 08 1727 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2263
Valid From: 2026 Sep 07 2000 UTC
Now Valid Until: 2026 Sep 08 2359 UTC
Warning Condition: Persistence
NOAA Scale: G1 - Minor
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.
# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov
661
WOXX32 KWNP 060001
WARPX1
Space Weather Message Code: WARPX1
Serial Number: 632
Issue Time: 2026 Sep 05 2358 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 631
Valid From: 2026 Sep 05 1620 UTC
Now Valid Until: 2026 Sep 06 1200 UTC
Warning Condition: Persistence
NOAA Scale: S1 - Minor
# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov
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