Space Weather Message Code: WARK04 Serial Number: 3299 Issue Time: 2017 Sep 01 0523 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3298 Valid From: 2017 Aug 31 0510 UTC Now Valid Until: 2017 Sep 01 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 65 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: WARK04 Serial Number: 3298 Issue Time: 2017 Aug 31 2357 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3297 Valid From: 2017 Aug 31 0510 UTC Now Valid Until: 2017 Sep 01 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: WARK06 Serial Number: 393 Issue Time: 2017 Aug 31 1336 UTC WARNING: Geomagnetic K-Index of 6 expected Valid From: 2017 Aug 31 1337 UTC Valid To: 2017 Aug 31 1800 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: 1143 Issue Time: 2017 Aug 31 1320 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Aug 31 1319 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: WARK05 Serial Number: 1386 Issue Time: 2017 Aug 31 1145 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1385 Valid From: 2017 Aug 31 0543 UTC Now Valid Until: 2017 Aug 31 1700 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: 3296 Issue Time: 2017 Aug 31 1101 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3295 Valid From: 2017 Aug 31 0510 UTC Now Valid Until: 2017 Aug 31 1900 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: 1142 Issue Time: 2017 Aug 31 1034 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Aug 31 1022 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: ALTK05 Serial Number: 1141 Issue Time: 2017 Aug 31 0832 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Aug 31 0823 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: ALTK04 Serial Number: 1999 Issue Time: 2017 Aug 31 0717 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Aug 31 0709 UTC Synoptic Period: 0600-0900 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: WARK05 Serial Number: 1385 Issue Time: 2017 Aug 31 0544 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Aug 31 0543 UTC Valid To: 2017 Aug 31 1200 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