WATCH: Geomagnetic Storm Category G1 Predicted

Space Weather Message Code: WATA20
Serial Number: 887
Issue Time: 2021 Mar 11 1707 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Mar 12: None (Below G1) Mar 13: G1 (Minor) Mar 14: None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Comment: G1 Watch for likely effects from a geoeffective, negative polarity coronal hole High speed stream.

NOAA Space Weather Scale descriptions can be found at Scales Explanation
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60° Geomagnetic Latitude.
Induced Currents – Weak power grid fluctuations can occur.
Spacecraft – Minor impact on satellite operations possible.
Aurora – Northern Lights may be visible at High Latitudes (60°+), --->, Stockholm, Oslo, Helsinki.

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