Geomagnetic Storm A-index of 20 or greater predicted

Space Weather Message Code: WATA20
Serial Number: 472
Issue Time: 2011 Jun 04 1951 UTC

WATCH: Geomagnetic A-index of 20 or greater predicted
NOAA Scale: Periods reaching the G1 (Minor) Level Likely
Valid for UTC Day: 2011 Jun 05