Space Weather Message Code: WARK07
Serial Number: 81
Issue Time: 2021 Nov 04 0848 UTC
EXTENDED WARNING: Geomagnetic K-index: 7 or greater expected
Extension to Serial Number: 80
Valid From: 2021 Nov 03 2204 UTC
Now Valid Until: 2021 Nov 04 1500 UTC
Warning Condition: Persistence
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.