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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Monday, July 28, 2025 16:14:40 UTC

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NOAA Scales mini

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

The WAM-IPE space weather forecast model is now operational!