305
WOXX20 KWNP 251836
WATA20

Space Weather Message Code: WATA20
Serial Number: 1049
Issue Time: 2025 Jun 25 1831 UTC

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Jun 26:  G1 (Minor)   Jun 27:  G1 (Minor)   Jun 28:  None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Comment: G1 (Minor) geomagnetic storming is likely 26-27 June due to recurrent, negative poliarty coronal hole high speed stream effects.
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.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

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