NOAA / Space Weather Prediction Center

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Space Weather Alerts

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Alerts in Graphical Timelines: Past 7 days and Currently in Effect
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Alerts Issued in May 2009


Space Weather Message Code: SUMSUD
Serial Number: 97
Issue Time: 2009 May 28 0548 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2009 May 28 0520 UTC
Deviation: 33 nT
Station: Boulder

Comment: Deviation correction from prior summary.


Space Weather Message Code: SUMSUD
Serial Number: 96
Issue Time: 2009 May 28 0528 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2009 May 28 0520 UTC
Deviation: 18 nT
Station: Boulder


Space Weather Message Code: WARSUD
Serial Number: 66
Issue Time: 2009 May 28 0451 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2009 May 28 0525 UTC
Valid To: 2009 May 28 0545 UTC
IP Shock Passage Observed: 2009 May 28 0418 UTC


Space Weather Message Code: SUMSUD
Serial Number: 95
Issue Time: 2009 May 14 1223 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2009 May 14 1155 UTC
Deviation: 15 nT
Station: BOU-NOAA


Space Weather Message Code: ALTK04
Serial Number: 1410
Issue Time: 2009 May 08 0152 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2009 May 08 0151 UTC
Synoptic Period: 0000-0300 UTC
Station: Boulder
Active Warning: Yes


Space Weather Message Code: WARK04
Serial Number: 1588
Issue Time: 2009 May 08 0142 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2009 May 08 0141 UTC
Valid To: 2009 May 08 1600 UTC
Warning Condition: Onset