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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Thursday, December 11, 2025 17:41:24

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NOAA Scales mini

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Space Weather Conditions
on NOAA Scales
24-Hour Observed Maximums
R
no data
S
no data
G
no data
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
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G
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Current Space Weather Conditions
on NOAA Scales
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

G3 Warning into Wednesday Evening, 3 December

G3 on 3 December, 2025
G3 Warning into Wednesday Evening, 3 December
published: Friday, December 05, 2025 02:33 UTC

An anticipated coronal hole high speed stream (CH HSS) is having early related effects and a G3 Warning was issued into Wednesday evening (EST), 3 December. G3 levels were first reached at 3:31pm EST. CH HSS effects can change quickly, but often become weaker after initial, leading CH HSS effects wane. As always, stay informed at spaceweather.gov 

DAP - temp Head Section