EXTENDED WARNING: Geomagnetic K-Index of 6 expected -- Issue Time:2015 Apr 16 2328 UTC

Space Weather Message Code: WARK06
Serial Number: 264
Issue Time: 2015 Apr 16 2328 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 263
Valid From: 2015 Apr 16 2321 UTC
Now Valid Until: 2015 Apr 17 0400 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 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.