Space Weather Message Code: WARK05 Serial Number: 1392 Issue Time: 2017 Sep 07 0002 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Sep 07 0003 UTC Valid To: 2017 Sep 07 0900 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: 2002 Issue Time: 2017 Sep 06 2357 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Sep 06 2355 UTC Synoptic Period: 2100-2400 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: 3307 Issue Time: 2017 Sep 06 2332 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Sep 06 2330 UTC Valid To: 2017 Sep 07 1200 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: WATA30 Serial Number: 163 Issue Time: 2017 Sep 05 1313 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Sep 05: None (Below G1) Sep 06: G2 (Moderate) Sep 07: G2 (Moderate) 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

Space Weather Message Code: ALTK05 Serial Number: 1146 Issue Time: 2017 Sep 05 0000 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Sep 04 2359 UTC Synoptic Period: 2100-2400 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: 3306 Issue Time: 2017 Sep 04 2325 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3305 Valid From: 2017 Sep 04 1940 UTC Now Valid Until: 2017 Sep 05 0900 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: 1391 Issue Time: 2017 Sep 04 2318 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Sep 04 2317 UTC Valid To: 2017 Sep 05 0600 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: 2001 Issue Time: 2017 Sep 04 2103 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Sep 04 2059 UTC Synoptic Period: 1800-2100 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: 3305 Issue Time: 2017 Sep 04 1941 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Sep 04 1940 UTC Valid To: 2017 Sep 04 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: ALTK04 Serial Number: 2000 Issue Time: 2017 Sep 04 0213 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Sep 04 0213 UTC Synoptic Period: 0000-0300 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