Space Weather Message Code: ALTK04 Serial Number: 1920 Issue Time: 2016 Sep 08 0602 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2016 Sep 08 0559 UTC Synoptic Period: 0300-0600 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: 2974 Issue Time: 2016 Sep 08 0421 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Sep 08 0420 UTC Valid To: 2016 Sep 08 1500 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: 2973 Issue Time: 2016 Sep 07 1653 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Sep 07 1654 UTC Valid To: 2016 Sep 07 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: 2972 Issue Time: 2016 Sep 07 0436 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Sep 07 0435 UTC Valid To: 2016 Sep 07 1000 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: 1919 Issue Time: 2016 Sep 06 2058 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2016 Sep 06 2058 UTC Synoptic Period: 1800-2100 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: 2971 Issue Time: 2016 Sep 06 1956 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Sep 06 1956 UTC Valid To: 2016 Sep 06 2359 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: 2970 Issue Time: 2016 Sep 06 0524 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Sep 06 0525 UTC Valid To: 2016 Sep 06 1500 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: ALTK05 Serial Number: 1004 Issue Time: 2016 Sep 05 2101 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2016 Sep 05 2059 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G1 – Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents – Weak power grid fluctuations can occur.

Space Weather Message Code: WARK05 Serial Number: 1227 Issue Time: 2016 Sep 05 2100 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2016 Sep 05 2058 UTC Valid To: 2016 Sep 05 2359 UTC Warning Condition: Onset NOAA Scale: G1 – Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents – Weak power

Space Weather Message Code: WARK04 Serial Number: 2969 Issue Time: 2016 Sep 05 1707 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 2968 Valid From: 2016 Sep 04 0111 UTC Now Valid Until: 2016 Sep 06 0300 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 –