294
WOXX13 KWNP 160541
WARK04

Space Weather Message Code: WARK04
Serial Number: 5418
Issue Time: 2026 Sep 16 0538 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5417
Valid From: 2026 Sep 15 1849 UTC
Now Valid Until: 2026 Sep 16 1800 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/
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