Space Weather Message Code: WARK04 Serial Number: 3694 Issue Time: 2019 Nov 23 1358 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Nov 23 1400 UTC Valid To: 2019 Nov 23 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: WARK04 Serial Number: 3693 Issue Time: 2019 Nov 22 0515 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3692 Valid From: 2019 Nov 21 1758 UTC Now Valid Until: 2019 Nov 22 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: ALTK04 Serial Number: 2138 Issue Time: 2019 Nov 21 2247 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Nov 21 2244 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: ALTK04 Serial Number: 2136 Issue Time: 2019 Nov 21 2244 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Nov 21 1544 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: 3692 Issue Time: 2019 Nov 21 1758 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Nov 21 1758 UTC Valid To: 2019 Nov 22 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: 866 Issue Time: 2019 Nov 18 2112 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Nov 19: None (Below G1) Nov 20: None (Below G1) Nov 21: 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: 3691 Issue Time: 2019 Nov 11 0959 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Nov 11 1000 UTC Valid To: 2019 Nov 11 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: 2135 Issue Time: 2019 Oct 31 0209 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2019 Oct 31 0208 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: WARK04 Serial Number: 3690 Issue Time: 2019 Oct 31 0043 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2019 Oct 31 0043 UTC Valid To: 2019 Oct 31 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: 3689 Issue Time: 2019 Oct 28 1217 UTC CANCEL WARNING: Geomagnetic K-index of 4 expected Cancel Serial Number: 3688 Original Issue Time: 2019 Oct 24 1103 UTC Comment: Active conditions no longer expected. 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