Space Weather Message Code: WARK04 Serial Number: 3826 Issue Time: 2021 Feb 19 1755 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3825 Valid From: 2021 Feb 19 1411 UTC Now Valid Until: 2021 Feb 19 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 –

Space Weather Message Code: ALTK04 Serial Number: 2193 Issue Time: 2021 Feb 19 1443 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Feb 19 1434 UTC Synoptic Period: 1200-1500 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: 3825 Issue Time: 2021 Feb 19 1411 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Feb 19 1411 UTC Valid To: 2021 Feb 19 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: 882 Issue Time: 2021 Feb 18 1706 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Feb 19: None (Below G1) Feb 20: None (Below G1) Feb 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: 3824 Issue Time: 2021 Feb 16 1144 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3823 Valid From: 2021 Feb 16 0528 UTC Now Valid Until: 2021 Feb 16 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 –

Space Weather Message Code: ALTK04 Serial Number: 2192 Issue Time: 2021 Feb 16 0538 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Feb 16 0536 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

Space Weather Message Code: WARK04 Serial Number: 3823 Issue Time: 2021 Feb 16 0529 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Feb 16 0528 UTC Valid To: 2021 Feb 16 1200 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: 2191 Issue Time: 2021 Feb 13 1047 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Feb 13 1045 UTC Synoptic Period: 0900-1200 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: 3822 Issue Time: 2021 Feb 13 0421 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Feb 13 0420 UTC Valid To: 2021 Feb 13 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: 3821 Issue Time: 2021 Feb 08 2333 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Feb 08 2331 UTC Valid To: 2021 Feb 09 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