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.
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.