Space Weather Message Code: WARK05 Serial Number: 1263 Issue Time: 2016 Oct 26 0257 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1262 Valid From: 2016 Oct 25 0215 UTC Now Valid Until: 2016 Oct 26 1500 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK06 Serial Number: 419 Issue Time: 2016 Oct 25 2242 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2016 Oct 25 2236 UTC Synoptic Period: 2100-2400 UTC Active Warning: Yes NOAA Scale: G2 – Moderate NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents – Power grid fluctuations can occur. High-latitude

Space Weather Message Code: ALTK05 Serial Number: 1037 Issue Time: 2016 Oct 25 2159 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2016 Oct 25 2156 UTC Synoptic Period: 2100-2400 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: WATA30 Serial Number: 149 Issue Time: 2016 Oct 25 2104 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Oct 26: G2 (Moderate) Oct 27: G1 (Minor) Oct 28: 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 55 degrees Geomagnetic Latitude. Induced Currents

Space Weather Message Code: WARK05 Serial Number: 1262 Issue Time: 2016 Oct 25 2012 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1261 Valid From: 2016 Oct 25 0215 UTC Now Valid Until: 2016 Oct 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK05 Serial Number: 1036 Issue Time: 2016 Oct 25 1953 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2016 Oct 25 1946 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: ALTK06 Serial Number: 418 Issue Time: 2016 Oct 25 1721 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2016 Oct 25 1714 UTC Synoptic Period: 1500-1800 UTC Active Warning: Yes NOAA Scale: G2 – Moderate NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents – Power grid fluctuations can occur. High-latitude

Space Weather Message Code: ALTK05 Serial Number: 1035 Issue Time: 2016 Oct 25 1705 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2016 Oct 25 1658 UTC Synoptic Period: 1500-1800 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: ALTK07 Serial Number: 104 Issue Time: 2016 Oct 25 1503 UTC ALERT: Geomagnetic K-index of 7 Threshold Reached: 2016 Oct 25 1459 UTC Synoptic Period: 1200-1500 UTC Active Warning: Yes NOAA Scale: G3 – Strong NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude. Induced Currents – Power system voltage irregularities possible, false

Space Weather Message Code: WARK05 Serial Number: 1261 Issue Time: 2016 Oct 25 1345 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1260 Valid From: 2016 Oct 25 0215 UTC Now Valid Until: 2016 Oct 25 2100 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 60 degrees Geomagnetic Latitude. Induced Currents –