Space Weather Message Code: WARK05 Serial Number: 1621 Issue Time: 2021 Nov 30 2150 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2021 Nov 30 2150 UTC Valid To: 2021 Dec 01 0300 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: ALTK04 Serial Number: 2254 Issue Time: 2021 Nov 30 2144 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Nov 30 2141 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: 3978 Issue Time: 2021 Nov 30 2141 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Nov 30 2141 UTC Valid To: 2021 Dec 01 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: 3977 Issue Time: 2021 Nov 29 0256 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3976 Valid From: 2021 Nov 28 2225 UTC Now Valid Until: 2021 Nov 29 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 65 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: ALTK04 Serial Number: 2253 Issue Time: 2021 Nov 29 0256 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Nov 29 0247 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: 3976 Issue Time: 2021 Nov 28 2224 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Nov 28 2225 UTC Valid To: 2021 Nov 29 0300 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: 3975 Issue Time: 2021 Nov 28 0852 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3974 Valid From: 2021 Nov 27 2300 UTC Now Valid Until: 2021 Nov 28 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: WARK04 Serial Number: 3974 Issue Time: 2021 Nov 28 0237 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3973 Valid From: 2021 Nov 27 2300 UTC Now Valid Until: 2021 Nov 28 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 –

Space Weather Message Code: WARK04 Serial Number: 3973 Issue Time: 2021 Nov 27 2301 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Nov 27 2300 UTC Valid To: 2021 Nov 28 0300 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: 3972 Issue Time: 2021 Nov 22 0535 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3971 Valid From: 2021 Nov 22 0130 UTC Now Valid Until: 2021 Nov 22 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 –