Space Weather Message Code: WARK05 Serial Number: 1390 Issue Time: 2017 Sep 02 0929 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1389 Valid From: 2017 Sep 02 0421 UTC Now Valid Until: 2017 Sep 02 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: ALTK05 Serial Number: 1145 Issue Time: 2017 Sep 02 0808 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Sep 02 0808 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: WARK06 Serial Number: 394 Issue Time: 2017 Sep 02 0455 UTC WARNING: Geomagnetic K-Index of 6 expected Valid From: 2017 Sep 02 0455 UTC Valid To: 2017 Sep 02 0900 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: 1144 Issue Time: 2017 Sep 02 0448 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Sep 02 0448 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: WARK05 Serial Number: 1389 Issue Time: 2017 Sep 02 0421 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Sep 02 0421 UTC Valid To: 2017 Sep 02 1000 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: 3300 Issue Time: 2017 Sep 01 2330 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3299 Valid From: 2017 Aug 31 0510 UTC Now Valid Until: 2017 Sep 02 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: WARK05 Serial Number: 1388 Issue Time: 2017 Sep 01 1011 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Sep 01 1015 UTC Valid To: 2017 Sep 01 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: 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