Space Weather Message Code: ALTK06 Serial Number: 417 Issue Time: 2016 Oct 25 1340 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2016 Oct 25 1339 UTC Synoptic Period: 1200-1500 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: 1034 Issue Time: 2016 Oct 25 1259 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2016 Oct 25 1259 UTC Synoptic Period: 1200-1500 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: WARK06 Serial Number: 361 Issue Time: 2016 Oct 25 1128 UTC WARNING: Geomagnetic K-Index of 6 expected Valid From: 2016 Oct 25 1127 UTC Valid To: 2016 Oct 25 1500 UTC Warning Condition: Onset 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

Space Weather Message Code: ALTK05 Serial Number: 1033 Issue Time: 2016 Oct 25 1121 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2016 Oct 25 1119 UTC Synoptic Period: 0900-1200 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: 1260 Issue Time: 2016 Oct 25 0838 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1259 Valid From: 2016 Oct 25 0215 UTC Now Valid Until: 2016 Oct 25 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: WARK04 Serial Number: 3026 Issue Time: 2016 Oct 25 0836 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3025 Valid From: 2016 Oct 24 0215 UTC Now Valid Until: 2016 Oct 25 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: ALTK05 Serial Number: 1032 Issue Time: 2016 Oct 25 0601 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2016 Oct 25 0559 UTC Synoptic Period: 0300-0600 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: 3025 Issue Time: 2016 Oct 25 0214 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3024 Valid From: 2016 Oct 24 0215 UTC Now Valid Until: 2016 Oct 25 1200 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: WATA30 Serial Number: 148 Issue Time: 2016 Oct 24 2112 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Oct 25: G2 (Moderate) Oct 26: G2 (Moderate) Oct 27: 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: 1258 Issue Time: 2016 Oct 24 1304 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2016 Oct 24 1303 UTC Valid To: 2016 Oct 24 1800 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