Space Weather Message Code: WARK04 Serial Number: 3357 Issue Time: 2017 Oct 26 1255 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3356 Valid From: 2017 Oct 24 1216 UTC Now Valid Until: 2017 Oct 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: WARK05 Serial Number: 1430 Issue Time: 2017 Oct 26 1253 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Oct 26 1253 UTC Valid To: 2017 Oct 26 2100 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: 3356 Issue Time: 2017 Oct 26 1114 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3355 Valid From: 2017 Oct 24 1216 UTC Now Valid Until: 2017 Oct 26 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: 3355 Issue Time: 2017 Oct 26 0555 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3354 Valid From: 2017 Oct 24 1216 UTC Now Valid Until: 2017 Oct 26 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: WARK04 Serial Number: 3354 Issue Time: 2017 Oct 25 1755 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3353 Valid From: 2017 Oct 24 1216 UTC Now Valid Until: 2017 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 65 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK05 Serial Number: 1189 Issue Time: 2017 Oct 25 0859 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Oct 25 0859 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: WARK04 Serial Number: 3353 Issue Time: 2017 Oct 25 0856 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3352 Valid From: 2017 Oct 24 1216 UTC Now Valid Until: 2017 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: WARK05 Serial Number: 1429 Issue Time: 2017 Oct 25 0800 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Oct 25 0800 UTC Valid To: 2017 Oct 25 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: WARK05 Serial Number: 1428 Issue Time: 2017 Oct 24 2046 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1427 Valid From: 2017 Oct 24 1438 UTC Now Valid Until: 2017 Oct 25 0600 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: WARK04 Serial Number: 3352 Issue Time: 2017 Oct 24 2045 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3351 Valid From: 2017 Oct 24 1216 UTC Now Valid Until: 2017 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 –