Space Weather Message Code: WARK04 Serial Number: 3971 Issue Time: 2021 Nov 22 0130 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Nov 22 0130 UTC Valid To: 2021 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: WARK04 Serial Number: 3970 Issue Time: 2021 Nov 20 1728 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Nov 20 1727 UTC Valid To: 2021 Nov 21 0900 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: 3969 Issue Time: 2021 Nov 17 1111 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Nov 17 1111 UTC Valid To: 2021 Nov 17 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: ALTK04 Serial Number: 2252 Issue Time: 2021 Nov 17 0247 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Nov 17 0245 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: 3968 Issue Time: 2021 Nov 17 0236 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Nov 17 0236 UTC Valid To: 2021 Nov 17 0900 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: 3967 Issue Time: 2021 Nov 16 0550 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3966 Valid From: 2021 Nov 15 2059 UTC Now Valid Until: 2021 Nov 16 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: ALTK04 Serial Number: 2251 Issue Time: 2021 Nov 15 2104 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Nov 15 2100 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: 3966 Issue Time: 2021 Nov 15 2102 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Nov 15 2059 UTC Valid To: 2021 Nov 16 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: 3965 Issue Time: 2021 Nov 10 0242 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Nov 10 0242 UTC Valid To: 2021 Nov 10 0900 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: 3963 Issue Time: 2021 Nov 06 1755 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3962 Valid From: 2021 Nov 05 0517 UTC Now Valid Until: 2021 Nov 06 2359 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 –