Space Weather Message Code: WARK04 Serial Number: 2923 Issue Time: 2016 Jul 29 0959 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 2922 Valid From: 2016 Jul 28 1831 UTC Now Valid Until: 2016 Jul 29 1300 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 –