Space Weather Message Code: WARK05 Serial Number: 1863 Issue Time: 2024 Apr 16 1108 UTC WARNING: Geomagnetic K-index of 5 expected Valid From: 2024 Apr 16 1108 UTC Valid To: 2024 Apr 16 1500 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: WARK04 Serial Number: 4586 Issue Time: 2024 Apr 16 0556 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 4585 Valid From: 2024 Apr 15 2306 UTC Now Valid Until: 2024 Apr 16 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: 2438 Issue Time: 2024 Apr 16 0100 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2024 Apr 16 0053 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: 4585 Issue Time: 2024 Apr 15 2306 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Apr 15 2306 UTC Valid To: 2024 Apr 16 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: 997 Issue Time: 2024 Apr 13 2110 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Apr 14: G1 (Minor) Apr 15: G1 (Minor) Apr 16: None (Below G1) 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: WATA20 Serial Number: 996 Issue Time: 2024 Apr 12 2112 UTC WATCH: Geomagnetic Storm Category G1 Predicted Highest Storm Level Predicted by Day: Apr 13: None (Below G1) Apr 14: G1 (Minor) Apr 15: None (Below G1) 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: WARK04 Serial Number: 4584 Issue Time: 2024 Apr 09 0534 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Apr 09 0533 UTC Valid To: 2024 Apr 09 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: 4583 Issue Time: 2024 Apr 08 0521 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Apr 08 0520 UTC Valid To: 2024 Apr 08 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

Space Weather Message Code: WARK04 Serial Number: 4582 Issue Time: 2024 Apr 06 0203 UTC WARNING: Geomagnetic K-index of 4 expected Valid From: 2024 Apr 06 0205 UTC Valid To: 2024 Apr 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 – Weak power grid fluctuations can occur. Aurora

Space Weather Message Code: WATA20 Serial Number: 995 Issue Time: 2024 Apr 05 1806 UTC CANCEL WATCH: Geomagnetic Storm Category G1 Predicted Cancel Serial Number: 994 Original Issue Time: 2024 Apr 02 1926 UTC Comment: Conditions no longer meet watch criteria. 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