Space Weather Message Code: WARK04 Serial Number: 4581 Issue Time: 2024 Apr 05 0555 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4580 Valid From: 2024 Apr 04 1138 UTC Now Valid Until: 2024 Apr 05 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: ALTK04 Serial Number: 2437 Issue Time: 2024 Apr 05 0002 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2024 Apr 04 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: 4580 Issue Time: 2024 Apr 04 2256 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4579 Valid From: 2024 Apr 04 1138 UTC Now Valid Until: 2024 Apr 05 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 –

Space Weather Message Code: WARK04 Serial Number: 4579 Issue Time: 2024 Apr 04 1139 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Apr 04 1138 UTC Valid To: 2024 Apr 04 2359 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: 4578 Issue Time: 2024 Apr 03 0210 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Apr 03 0210 UTC Valid To: 2024 Apr 03 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: WATA20 Serial Number: 994 Issue Time: 2024 Apr 02 1926 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Apr 03: None (Below G1) Apr 04: G1 (Minor) Apr 05: 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. Induced

Space Weather Message Code: WARK04 Serial Number: 4577 Issue Time: 2024 Apr 02 1103 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Apr 02 1102 UTC Valid To: 2024 Apr 02 1800 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: WATA20 Serial Number: 993 Issue Time: 2024 Apr 01 1808 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Apr 02: None (Below G1) Apr 03: None (Below G1) Apr 04: 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: 2436 Issue Time: 2024 Apr 01 0803 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2024 Apr 01 0803 UTC Synoptic Period: 0600-0900 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: 4576 Issue Time: 2024 Apr 01 0739 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Apr 01 0740 UTC Valid To: 2024 Apr 01 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