Severe thunderstorm and heavy rainfall threats will persist from the Midwest to Lower Great Lakes through Monday, shifting into the Ohio Valley and Central Appalachians Monday evening into Tuesday. Mid-summer heat will continue across much of the CONUS this week, with record highs possible well into the 100s across the south-central 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
095
WOXX10 KWNP 111051
WARSUD
Space Weather Message Code: WARSUD
Serial Number: 258
Issue Time: 2026 Aug 11 1047 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2026 Aug 11 1040 UTC
Valid To: 2026 Aug 11 1248 UTC
Ip Shock: 2026-08-11 10:43
Comment: Weak shock detected at L1.
# 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
437
WOXX13 KWNP 141056
WARK04
Space Weather Message Code: WARK04
Serial Number: 5401
Issue Time: 2026 Aug 14 1054 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Aug 14 1052 UTC
Valid To: 2026 Aug 14 2359 UTC
Warning Conditions: Onset
Comment:
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
342
WOXX11 KWNP 082031
WARK05
Space Weather Message Code: WARK05
Serial Number: 2258
Issue Time: 2026 Aug 08 2029 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2257
Valid From: 2026 Aug 08 1222 UTC
Now Valid Until: 2026 Aug 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
353
WOXX12 KWNP 082041
WARK06
Space Weather Message Code: WARK06
Serial Number: 670
Issue Time: 2026 Aug 08 2035 UTC
WARNING: Geomagnetic K-index of 6 expected
Valid From: 2026 Aug 08 2035 UTC
Valid To: 2026 Aug 08 2359 UTC
Warning Conditions: Onset
Noaa Scale: G2 - Moderate
Comment:
NOAA Scale: G2 - Moderate
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
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