EXTENDED WARNING: Geomagnetic K-Index of 6

Space Weather Message Code: WARK06 Serial Number: 276 Issue Time: 2015 Jul 05 0018 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected

Extension to Serial Number: 275 Valid From: 2015 Jul 04 2050 UTC Now Valid Until: 2015 Jul 05 0700 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/NOAAscales

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.