http://www.swpc.noaa.gov/alerts/archive/current_month.html

Space Weather Message Code: WARK05
Serial Number: 697
Issue Time: 2011 May 02 0733 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 696
Valid From: 2011 May 02 0414 UTC
Now Valid Until: 2011 May 02 1200 UTC
Warning Condition: Onset