Space Weather Message Code: WARK04 Serial Number: 3095 Issue Time: 2016 Dec 27 0505 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3094 Valid From: 2016 Dec 26 1455 UTC Now Valid Until: 2016 Dec 27 1800 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 –

Space Weather Message Code: WARK04 Serial Number: 3094 Issue Time: 2016 Dec 26 2114 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3093 Valid From: 2016 Dec 26 1455 UTC Now Valid Until: 2016 Dec 27 0600 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 –

Space Weather Message Code: ALTK04 Serial Number: 1942 Issue Time: 2016 Dec 26 1501 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2016 Dec 26 1459 UTC Synoptic Period: 1200-1500 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: 3093 Issue Time: 2016 Dec 26 1456 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Dec 26 1455 UTC Valid To: 2016 Dec 26 2200 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: 1057 Issue Time: 2016 Dec 26 0204 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2016 Dec 26 0204 UTC Synoptic Period: 0000-0300 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: WARK04 Serial Number: 3092 Issue Time: 2016 Dec 26 0203 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3091 Valid From: 2016 Dec 25 0255 UTC Now Valid Until: 2016 Dec 26 1400 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 –

Space Weather Message Code: WARK05 Serial Number: 1295 Issue Time: 2016 Dec 26 0201 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2016 Dec 26 0200 UTC Valid To: 2016 Dec 26 0900 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: 3091 Issue Time: 2016 Dec 25 2338 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3090 Valid From: 2016 Dec 25 0255 UTC Now Valid Until: 2016 Dec 26 0600 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 –

Space Weather Message Code: WARK04 Serial Number: 3090 Issue Time: 2016 Dec 25 1318 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3089 Valid From: 2016 Dec 25 0255 UTC Now Valid Until: 2016 Dec 25 2359 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 –

Space Weather Message Code: ALTK04 Serial Number: 1941 Issue Time: 2016 Dec 25 0259 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2016 Dec 25 0259 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