Space Weather Message Code: ALTK04 Serial Number: 1912 Issue Time: 2016 Aug 21 1807 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2016 Aug 21 1759 UTC Synoptic Period: 1500-1800 UTC Active Warning: Yes 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

Space Weather Message Code: WARK04 Serial Number: 2944 Issue Time: 2016 Aug 21 1556 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Aug 21 1555 UTC Valid To: 2016 Aug 21 2100 UTC Warning Condition: Onset 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

Space Weather Message Code: WARK04 Serial Number: 2943 Issue Time: 2016 Aug 16 2312 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Aug 16 2311 UTC Valid To: 2016 Aug 17 0600 UTC Warning Condition: Onset 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

Space Weather Message Code: ALTK04 Serial Number: 1911 Issue Time: 2016 Aug 12 0245 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2016 Aug 12 0245 UTC Synoptic Period: 0000-0300 UTC Active Warning: Yes 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

Space Weather Message Code: WARK04 Serial Number: 2942 Issue Time: 2016 Aug 12 0238 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Aug 12 0238 UTC Valid To: 2016 Aug 12 1300 UTC Warning Condition: Onset 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

Space Weather Message Code: WARK04 Serial Number: 2941 Issue Time: 2016 Aug 10 2017 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Aug 10 2020 UTC Valid To: 2016 Aug 11 0600 UTC Warning Condition: Onset 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

Space Weather Message Code: ALTK04 Serial Number: 1910 Issue Time: 2016 Aug 10 0850 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2016 Aug 10 0848 UTC Synoptic Period: 0600-0900 UTC Active Warning: Yes 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

Space Weather Message Code: WARK04 Serial Number: 2940 Issue Time: 2016 Aug 10 0848 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 2939 Valid From: 2016 Aug 09 2230 UTC Now Valid Until: 2016 Aug 10 1600 UTC Warning Condition: Onset 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 –

Space Weather Message Code: WARK04 Serial Number: 2939 Issue Time: 2016 Aug 09 2226 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Aug 09 2230 UTC Valid To: 2016 Aug 10 0859 UTC Warning Condition: Onset 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

Space Weather Message Code: WARK04 Serial Number: 2938 Issue Time: 2016 Aug 09 1530 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 2937 Valid From: 2016 Aug 09 0905 UTC Now Valid Until: 2016 Aug 09 1900 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 –