Space Weather Message Code: WARK05
Serial Number: 1344
Issue Time: 2017 Apr 21 2157 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1343
Valid From: 2017 Apr 21 1920 UTC
Now Valid Until: 2017 Apr 22 0900 UTC
Warning Condition: Persistence
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents – Weak power grid fluctuations can occur.
Spacecraft – Minor impact on satellite operations possible.
Aurora – Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.