Space Weather Message Code: ALTK04
Serial Number: 1506
Issue Time: 2011 Apr 20 0430 UTC
K-index of 4
Threshold Reached: 2011 Apr 20 0427 UTC
Synoptic Period: 2100-2400 UTC
Station: Boulder
Space Weather Message Code: WARK04
Serial Number: 1722
Issue Time: 2011 Apr 20 0430 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2011 Apr 20 0430 UTC
Valid To: 2011 Apr 20 1600 UTC
Warning Condition: Onset
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