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363
WOXX13 KWNP 120951
WARK04

Space Weather Message Code: WARK04
Serial Number: 5317
Issue Time: 2026 Apr 12 0945 UTC

CANCEL WARNING: Geomagnetic K-index of 4 expected
Cancel Serial Number: 5316
Original Issue Time: 2026 Apr 10 0143 UTC

Comment: Active conditions (Kp=4) are no longer expected to occur.
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

779
WOXX11 KWNP 101431
WARK05

Space Weather Message Code: WARK05
Serial Number: 2223
Issue Time: 2026 Apr 10 1426 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Apr 10 1425 UTC
Valid To: 2026 Apr 11 0900 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