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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Monday, June 02, 2025 11:53:25

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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
no data
G
no data
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

G4 Watch Key Messages

G4 Watch Key Messages
G4 Watch Key Messages
published: Saturday, May 31, 2025 21:41 UTC

We will not know the true nature of the CME structure until it arrives at our solar wind observatories located 1 million miles from Earth. Meanwhile, these Watches represent our best assessment based on potential. When the CME arrives, it is at that point, SWPC forecasters can make determinations about warnings and subsequent alerts. Please continue to visit our website for the latest information and updates.