Space Weather Message Code: WARK05
Serial Number: 1609
Issue Time: 2021 Aug 28 0228 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1608
Valid From: 2021 Aug 27 1800 UTC
Now Valid Until: 2021 Aug 28 0900 UTC
Warning Condition: Persistence
NOAA Space Weather Scale descriptions can be found at
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.