Space Weather Message Code: WARK05 Serial Number: 1417 Issue Time: 2017 Oct 12 1044 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1416 Valid From: 2017 Oct 11 0730 UTC Now Valid Until: 2017 Oct 12 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK05 Serial Number: 1176 Issue Time: 2017 Oct 12 0041 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Oct 12 0040 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: WARK05 Serial Number: 1416 Issue Time: 2017 Oct 11 2357 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1415 Valid From: 2017 Oct 11 0730 UTC Now Valid Until: 2017 Oct 12 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK05 Serial Number: 1175 Issue Time: 2017 Oct 11 1751 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Oct 11 1748 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: WARK05 Serial Number: 1415 Issue Time: 2017 Oct 11 1419 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1414 Valid From: 2017 Oct 11 0730 UTC Now Valid Until: 2017 Oct 11 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK05 Serial Number: 1174 Issue Time: 2017 Oct 11 0851 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Oct 11 0851 UTC Synoptic Period: 0600-0900 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: 1414 Issue Time: 2017 Oct 11 0728 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Oct 11 0730 UTC Valid To: 2017 Oct 11 1500 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: ALTK04 Serial Number: 2009 Issue Time: 2017 Oct 11 0553 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Oct 11 0551 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: 3339 Issue Time: 2017 Oct 11 0151 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Oct 11 0150 UTC Valid To: 2017 Oct 12 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: WATA20 Serial Number: 801 Issue Time: 2017 Oct 10 1947 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Oct 11: G1 (Minor) Oct 12: G1 (Minor) Oct 13: 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. Induced Currents