Space Weather Message Code: WARK04
Serial Number: 3696
Issue Time: 2019 Dec 18 1432 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3695
Valid From: 2019 Dec 18 1153 UTC
Now Valid Until: 2019 Dec 19 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.