Space Weather Message Code: WATA30 Serial Number: 143 Issue Time: 2016 Oct 16 2112 UTC WATCH: Geomagnetic Storm Category G2 Predicted Highest Storm Level Predicted by Day: Oct 17: G2 (Moderate) Oct 18: None (Below G1) Oct 19: None (Below G1) 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.

Space Weather Message Code: ALTK05 Serial Number: 1031 Issue Time: 2016 Oct 16 1853 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2016 Oct 16 1853 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: ALTK04 Serial Number: 1929 Issue Time: 2016 Oct 16 1833 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2016 Oct 16 1833 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: 3017 Issue Time: 2016 Oct 16 0806 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2016 Oct 16 0804 UTC Valid To: 2016 Oct 17 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: WATA20 Serial Number: 746 Issue Time: 2016 Oct 14 2024 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Oct 15: G1 (Minor) Oct 16: G1 (Minor) Oct 17: G1 (Minor) THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT Comment: G1 (Minor) geomagnetic storm conditions are likely for the early portion of 15 Oct due to residual effects from the 09 Oct CME.

Space Weather Message Code: ALTK05 Serial Number: 1030 Issue Time: 2016 Oct 14 0820 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2016 Oct 14 0820 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: WARK04 Serial Number: 3015 Issue Time: 2016 Oct 14 1053 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3014 Valid From: 2016 Oct 12 2228 UTC Now Valid Until: 2016 Oct 14 2100 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: 1030 Issue Time: 2016 Oct 14 0820 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2016 Oct 14 0820 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: 360 Issue Time: 2016 Oct 14 0250 UTC EXTENDED WARNING: Geomagnetic K-Index of 6 expected Extension to Serial Number: 359 Valid From: 2016 Oct 13 1237 UTC Now Valid Until: 2016 Oct 14 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 55 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK06 Serial Number: 416 Issue Time: 2016 Oct 14 0139 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2016 Oct 14 0139 UTC Synoptic Period: 0000-0300 UTC Active Warning: Yes 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 fluctuations can occur. High-latitude