Space Weather Message Code: WATA99

Serial Number: 7

Issue Time: 2024 May 11 1753 UTC



WATCH: Geomagnetic Storm Category G4 or Greater Predicted



Highest Storm Level Predicted by Day:

May 12:  G5 (Extreme)   May 13:  G3 (Strong)   May 14:  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 45 degrees Geomagnetic Latitude.

Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify.

Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur.

Navigation - Satellite navigation (GPS) degraded or inoperable for hours.

Radio - HF (high frequency) radio propagation sporadic or blacked out.

Aurora - Aurora may be seen as low as Alabama and northern California.

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