Space Weather Message Code: WARK04 Serial Number: 4107 Issue Time: 2022 May 22 1455 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4106 Valid From: 2022 May 22 0120 UTC Now Valid Until: 2022 May 22 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 –

Space Weather Message Code: WARK04 Serial Number: 4107 Issue Time: 2022 May 22 1455 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4106 Valid From: 2022 May 22 0120 UTC Now Valid Until: 2022 May 22 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 –

Space Weather Message Code: WARK04 Serial Number: 4106 Issue Time: 2022 May 22 0840 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4105 Valid From: 2022 May 22 0120 UTC Now Valid Until: 2022 May 22 1500 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: 2297 Issue Time: 2022 May 22 0150 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2022 May 22 0150 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: 4105 Issue Time: 2022 May 22 0121 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 May 22 0120 UTC Valid To: 2022 May 22 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: ALTK04 Serial Number: 2296 Issue Time: 2022 May 21 0000 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2022 May 20 2359 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: 4104 Issue Time: 2022 May 20 2242 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 May 20 2240 UTC Valid To: 2022 May 21 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: 4103 Issue Time: 2022 May 17 1358 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 May 17 1358 UTC Valid To: 2022 May 17 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 – Weak power grid fluctuations can occur. Aurora

Space Weather Message Code: WARK04 Serial Number: 4102 Issue Time: 2022 May 16 0500 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 May 16 0500 UTC Valid To: 2022 May 16 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: ALTK04 Serial Number: 2295 Issue Time: 2022 May 15 0253 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2022 May 15 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