NOAA SWPC summary

Space Weather Message Code: WARK04 Serial Number: 5432 Issue Time: 2026 Oct 11 0457 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5431 Valid From: 2026 Oct 09 0128 UTC Now Valid Until: 2026 Oct 11 1200 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation 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.