Space Weather Message Code: WARK04 Serial Number: 3096 Issue Time: 2016 Dec 31 1134 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Dec 31 1133 UTC Valid To: 2017 Jan 01 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: WATA20 Serial Number: 761 Issue Time: 2016 Dec 31 0558 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Dec 31: G1 (Minor) Jan 01: G1 (Minor) Jan 02: None (Below G1) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT 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

Space Weather Message Code: WATA20 Serial Number: 760 Issue Time: 2016 Dec 28 2100 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Dec 29: None (Below G1) Dec 30: None (Below G1) Dec 31: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT 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.

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