Space Weather Message Code: WARK04 Serial Number: 3962 Issue Time: 2021 Nov 06 1148 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3961 Valid From: 2021 Nov 05 0517 UTC Now Valid Until: 2021 Nov 06 1800 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: WARK04 Serial Number: 3961 Issue Time: 2021 Nov 05 2046 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3960 Valid From: 2021 Nov 05 0517 UTC Now Valid Until: 2021 Nov 06 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 –

Space Weather Message Code: WARK04 Serial Number: 3960 Issue Time: 2021 Nov 05 1157 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3959 Valid From: 2021 Nov 05 0517 UTC Now Valid Until: 2021 Nov 05 2100 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: 2249 Issue Time: 2021 Nov 05 0603 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2021 Nov 05 0559 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: 3959 Issue Time: 2021 Nov 05 0517 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2021 Nov 05 0517 UTC Valid To: 2021 Nov 05 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: ALTK06 Serial Number: 487 Issue Time: 2021 Nov 04 1453 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2021 Nov 04 1439 UTC Synoptic Period: 1200-1500 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

Space Weather Message Code: WARK06 Serial Number: 450 Issue Time: 2021 Nov 04 1435 UTC EXTENDED WARNING: Geomagnetic K-Index of 6 expected Extension to Serial Number: 449 Valid From: 2021 Nov 03 2135 UTC Now Valid Until: 2021 Nov 04 1800 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: WARK05 Serial Number: 1620 Issue Time: 2021 Nov 04 1413 UTC EXTENDED WARNING: Geomagnetic K-index of 5 expected Extension to Serial Number: 1619 Valid From: 2021 Nov 03 2005 UTC Now Valid Until: 2021 Nov 04 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 60 degrees Geomagnetic Latitude. Induced Currents –

Space Weather Message Code: WARK04 Serial Number: 3958 Issue Time: 2021 Nov 04 1412 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 3957 Valid From: 2021 Nov 03 2005 UTC Now Valid Until: 2021 Nov 05 0300 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: 1348 Issue Time: 2021 Nov 04 1331 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2021 Nov 04 1328 UTC Synoptic Period: 1200-1500 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.