Space Weather Message Code: WARK04
Serial Number: 3252
Issue Time: 2017 Jul 21 0214 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Jul 21 0212 UTC
Valid To: 2017 Jul 21 0600 UTC
Warning Condition: Onset
NOAA Space Weather Scale descriptions can be found at
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.