Space Weather Message Code: WARK04
Serial Number: 3834
Issue Time: 2021 Feb 22 2042 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Feb 22 2042 UTC
Valid To: 2021 Feb 23 0600 UTC
Warning Condition: Onset

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

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

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Space Weather Message Code: WATA20
Serial Number: 884
Issue Time: 2021 Feb 22 1141 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Feb 23: G1 (Minor) Feb 24: G1 (Minor) Feb 25: None (Below G1)

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 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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Space Weather Message Code: ALTEF3
Serial Number: 3102
Issue Time: 2021 Feb 22 0833 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3101
Begin Time: 2021 Feb 21 0535 UTC
Yesterday Maximum 2MeV Flux: 6702 pfu

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

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

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Space Weather Message Code: WARK04
Serial Number: 3833
Issue Time: 2021 Feb 21 2343 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3832
Valid From: 2021 Feb 19 2034 UTC
Now Valid Until: 2021 Feb 22 1200 UTC
Warning Condition: Persistence

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

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.