WOXX21 KWNP 211951

WATA30



Space Weather Message Code: WATA30

Serial Number: 266

Issue Time: 2026 Mar 21 1946 UTC



WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:

Mar 22:  G2 (Moderate)   Mar 23:  G1 (Minor)   Mar 24:  None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT



Comment: G2 (Moderate) geomagnetic storming is likely on 22 Mar due to waning CME influences followed by the anticipated arrival of CH HSS effects. Isolated periods of G1 (Minor) geomagnetic storming is likely to continue into 23 Mar as CH HSS effects continue.

www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.

Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.

Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.

Radio - HF (high frequency) radio propagation can fade at higher latitudes.

Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.



# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center

# Recent messages, data, and help at http://swpc.noaa.gov/alerts/

# Send questions to SWPC.Webmaster@noaa.gov