Space Weather Message Code: WARK04 Serial Number: 3294 Issue Time: 2017 Aug 29 2354 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3293 Valid From: 2017 Aug 29 1929 UTC Now Valid Until: 2017 Aug 30 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: ALTK04 Serial Number: 1998 Issue Time: 2017 Aug 29 1934 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2017 Aug 29 1934 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: 3293 Issue Time: 2017 Aug 29 1929 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Aug 29 1929 UTC Valid To: 2017 Aug 29 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: WATA20 Serial Number: 796 Issue Time: 2017 Aug 29 1839 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Aug 30: None (Below G1) Aug 31: G1 (Minor) Sep 01: 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: 795 Issue Time: 2017 Aug 28 2014 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Aug 29: None (Below G1) Aug 30: None (Below G1) Aug 31: 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: 3292 Issue Time: 2017 Aug 27 1846 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2017 Aug 27 1845 UTC Valid To: 2017 Aug 28 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 65 degrees Geomagnetic Latitude. Induced Currents – Weak power grid fluctuations can occur. Aurora

Space Weather Message Code: WARK04 Serial Number: 3291 Issue Time: 2017 Aug 24 0513 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3290 Valid From: 2017 Aug 22 2220 UTC Now Valid Until: 2017 Aug 24 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: 3290 Issue Time: 2017 Aug 23 2121 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3289 Valid From: 2017 Aug 22 2220 UTC Now Valid Until: 2017 Aug 24 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: 1140 Issue Time: 2017 Aug 23 2103 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2017 Aug 23 2059 UTC Synoptic Period: 1800-2100 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: 1384 Issue Time: 2017 Aug 23 1922 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2017 Aug 23 1925 UTC Valid To: 2017 Aug 23 2359 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