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550
WOXX13 KWNP 141156
WARK04

Space Weather Message Code: WARK04
Serial Number: 5063
Issue Time: 2025 Aug 14 1151 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5062
Valid From: 2025 Aug 13 2149 UTC
Now Valid Until: 2025 Aug 14 1500 UTC
Warning Condition: Persistence

Comment: High, lattitude areas under nightfall are expcted to continue to experience active geomagnetic conditions until 1500 UTC.
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.

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