Space Weather Message Code: WATA20 Serial Number: 913 Issue Time: 2022 Apr 26 2011 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Apr 27: None (Below G1) Apr 28: None (Below G1) Apr 29: 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: ALTK04 Serial Number: 2291 Issue Time: 2022 Apr 24 0003 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2022 Apr 23 2359 UTC Synoptic Period: 2100-0000 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: 4092 Issue Time: 2022 Apr 23 2138 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 23 2137 UTC Valid To: 2022 Apr 24 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: ALTK04 Serial Number: 2290 Issue Time: 2022 Apr 23 1205 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2022 Apr 23 1200 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: 4091 Issue Time: 2022 Apr 23 1037 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 23 1036 UTC Valid To: 2022 Apr 23 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: 4090 Issue Time: 2022 Apr 21 0547 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4089 Valid From: 2022 Apr 20 2312 UTC Now Valid Until: 2022 Apr 21 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: WARK04 Serial Number: 4089 Issue Time: 2022 Apr 20 2312 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 20 2312 UTC Valid To: 2022 Apr 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: 4088 Issue Time: 2022 Apr 19 0533 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 19 0534 UTC Valid To: 2022 Apr 19 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: WARK04 Serial Number: 4087 Issue Time: 2022 Apr 18 2156 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 18 2156 UTC Valid To: 2022 Apr 19 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: 4086 Issue Time: 2022 Apr 17 0208 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2022 Apr 17 0205 UTC Valid To: 2022 Apr 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