A heat wave over the Southwest will intensify late week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Severe thunderstorms and heavy rain are expected over portions of the Plains and Mississippi Valley tonight, which will shift to parts of the Upper Midwest and mid-Mississippi Valley Friday. Monsoonal showers and flooding persist in the Desert Southwest. Read More >
Plaese go to the Space Weather Prediction Center for more information.
Items in grey italics apparently are older than 24 hours
941
WOXX13 KWNP 240901
WARK04
Space Weather Message Code: WARK04
Serial Number: 5392
Issue Time: 2026 Jul 24 0856 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5391
Valid From: 2026 Jul 23 1432 UTC
Now Valid Until: 2026 Jul 24 1500 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
398
WOXX32 KWNP 301836
WARPX1
Space Weather Message Code: WARPX1
Serial Number: 628
Issue Time: 2026 Jul 30 1834 UTC
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2026 Jul 30 1833 UTC
Valid To: 2026 Jul 31 0900 UTC
Warning Conditions: Onset
Noaa Scale: S1 - Minor
Comment:
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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