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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Sunday, October 24, 2021 19:49:35

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NOAA Scales mini

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Space Weather Conditions
24-Hour Observed Maximums
R
no data
S
no data
G
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Latest Observed
R
no data
S
no data
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
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R
no data
S
no data
G
no data
Current Space Weather Conditions
R1 (Minor) Radio Blackout Impacts
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HF Radio: Weak or minor degradation of HF radio communication on sunlit side, occasional loss of radio contact.
Navigation: Low-frequency navigation signals degraded for brief intervals.
More about the NOAA Space Weather Scales

G2 (Moderate) Storm Watch for the 25 April UTC-day

G2 Watch for 25 April, 2021
G2 (Moderate) Storm Watch for the 25 April UTC-day
published: Sunday, April 25, 2021 02:48 UTC

A partial halo Coronal Mass Ejection (CME) was associated with a C3 flare from Region 2816 at 22/0435 UTC. This CME has been analyzed multiple times by SWPC forecasters and a best WSA-Enlil model result was determined. This solution indicates an Earth-directed component and arrival early to mid-day on the 25 April UTC-day. The forecast now calls for likely geomagnetic storm conditions, with the potential to reach G2 (Moderate) storm levels, therefore, a G2 geomagnetic storm watch has been issued for 25 April. While forecast confidence in an Earth-directed component is fair, timing and intensity confidence is lower. Continue to follow our webpage for the latest information.