> Space Weather Message Code: WARK05
> Serial Number: 837
> Issue Time: 2013 May 18 0531 UTC
>
> EXTENDED WARNING: Geomagnetic K-index of 5 expected
> Extension to Serial Number: 836
> Valid From: 2013 May 18 0252 UTC
> Now Valid Until: 2013 May 18 0900 UTC
> Warning Condition: Persistence
>
> NOAA Space Weather Scale descriptions can be found at
>
www.swpc.noaa.gov/NOAAscales
>
> 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.