Space Weather Message Code: WARK04 Serial Number: 2977 Issue Time: 2016 Sep 20 0634 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 2976 Valid From: 2016 Sep 19 1535 UTC Now Valid Until: 2016 Sep 20 1600 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: 1005 Issue Time: 2016 Sep 20 0301 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2016 Sep 20 0259 UTC Synoptic Period: 0000-0300 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: 1921 Issue Time: 2016 Sep 20 0135 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2016 Sep 20 0135 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

Space Weather Message Code: WARK05 Serial Number: 1229 Issue Time: 2016 Sep 20 0027 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2016 Sep 20 0030 UTC Valid To: 2016 Sep 20 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: WARK04 Serial Number: 2976 Issue Time: 2016 Sep 19 2240 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 2975 Valid From: 2016 Sep 19 1535 UTC Now Valid Until: 2016 Sep 20 0700 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 –

Space Weather Message Code: WARK05 Serial Number: 1228 Issue Time: 2016 Sep 19 1926 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2016 Sep 19 1925 UTC Valid To: 2016 Sep 19 2300 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: 2975 Issue Time: 2016 Sep 19 1536 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Sep 19 1535 UTC Valid To: 2016 Sep 19 2300 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: 742 Issue Time: 2016 Sep 17 0143 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Sep 18: None (Below G1) Sep 19: G1 (Minor) Sep 20: 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: 741 Issue Time: 2016 Sep 16 1859 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Sep 17: None (Below G1) Sep 18: None (Below G1) Sep 19: 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: ALTK04 Serial Number: 1920 Issue Time: 2016 Sep 08 0602 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2016 Sep 08 0559 UTC Synoptic Period: 0300-0600 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