Space Weather Message Code: WARK04
Serial Number: 2992
Issue Time: 2016 Sep 28 2049 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2991
Valid From: 2016 Sep 25 2022 UTC
Now Valid Until: 2016 Sep 29 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at

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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