Space Weather Message Code: ALTK04 Serial Number: 1995 Issue Time: 2017 Aug 17 0805 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Aug 17 0805 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: WARK04 Serial Number: 3275 Issue Time: 2017 Aug 17 0752 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Aug 17 0752 UTC Valid To: 2017 Aug 17 1800 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: 794 Issue Time: 2017 Aug 15 2037 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Aug 16: None (Below G1) Aug 17: G1 (Minor) Aug 18: 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

Space Weather Message Code: WATA20 Serial Number: 793 Issue Time: 2017 Aug 14 1836 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Aug 15: None (Below G1) Aug 16: None (Below G1) Aug 17: 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.

Space Weather Message Code: WARK04 Serial Number: 3274 Issue Time: 2017 Aug 12 2355 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3273 Valid From: 2017 Aug 12 0135 UTC Now Valid Until: 2017 Aug 13 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: WARK04 Serial Number: 3273 Issue Time: 2017 Aug 12 1455 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3272 Valid From: 2017 Aug 12 0135 UTC Now Valid Until: 2017 Aug 12 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: 3272 Issue Time: 2017 Aug 12 0135 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Aug 12 0135 UTC Valid To: 2017 Aug 12 1500 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: WARK04 Serial Number: 3271 Issue Time: 2017 Aug 06 1419 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3270 Valid From: 2017 Aug 03 1717 UTC Now Valid Until: 2017 Aug 06 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: 3270 Issue Time: 2017 Aug 06 0855 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3269 Valid From: 2017 Aug 03 1717 UTC Now Valid Until: 2017 Aug 06 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 65 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: WARK04 Serial Number: 3269 Issue Time: 2017 Aug 05 2353 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3268 Valid From: 2017 Aug 03 1717 UTC Now Valid Until: 2017 Aug 06 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 –