Space Weather Message Code: WARK04
Serial Number: 2084
Issue Time: 2013 May 19 1149 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2083
Valid From: 2013 May 19 0205 UTC
Now Valid Until: 2013 May 20 0100 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: WATA30
Serial Number: 105
Issue Time: 2013 May 17 2124 UTC

WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
May 18: None (Below G1) May 19: G2 (Moderate) May 20: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
[link to www.swpc.noaa.gov]

ACE Low Energy Protons:

[link to www.swpc.noaa.gov]

ACE MAG-SWEPAM:

[link to www.swpc.noaa.gov]