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WOXX14 KWNP 130651

Space Weather Message Code: WARK07
Serial Number: 44
Issue Time: 2014 Sep 13 0648 UTC

EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 43
Valid From: 2014 Sep 12 2306 UTC
Now Valid Until: 2014 Sep 13 1600 UTC
Warning Condition: Persistence

Comment: Extended warning due to continued potential for geomagnetic storming from the 10 Sep CME.
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.

# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
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National Weather Service
Last Modified: August 31, 2005
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