National Weather Service United States Department of Commerce

Heavy Rain From the Central Plains to the Mid-Atlantic; Heat Wave Begins This Weekend

Strong to severe thunderstorms and heavy rain will impact portions of the central Plains into the Upper Midwest and the Mid-Atlantic through the weekend. A stretch of unusually hot and humid weather is expected across portions of the central U.S. and the Southeast beginning this weekend and continuing through next week. The heat may reach dangerous levels, particularly mid to late next week. Read More >

Plaese go to the Space Weather Prediction Center for more information.
Items in grey italics apparently are older than 24 hours


007
WOXX13 KWNP 181441
WARK04

Space Weather Message Code: WARK04
Serial Number: 5042
Issue Time: 2025 Jul 18 1437 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5041
Valid From: 2025 Jul 17 0840 UTC
Now Valid Until: 2025 Jul 18 2359 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



319
WOXX11 KWNP 162256
WARK05

Space Weather Message Code: WARK05
Serial Number: 2081
Issue Time: 2025 Jul 16 2254 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Jul 16 2254 UTC
Valid To: 2025 Jul 17 0600 UTC
Warning Condition: Onset
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