:Product: 3-Day Forecast :Issued: 2025 Jul 09 1230 UTC # Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center # A. NOAA Geomagnetic Activity Observation and Forecast The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA Scale levels). The greatest expected 3 hr Kp for Jul 09-Jul 11 2025 is 3.00 (below NOAA Scale levels). NOAA Kp index breakdown Jul 09-Jul 11 2025 Jul 09 Jul 10 Jul 11 00-03UT 3.00 1.67 1.67 03-06UT 2.33 1.33 1.67 06-09UT 1.67 1.33 1.33 09-12UT 2.00 1.33 1.33 12-15UT 1.33 1.67 1.33 15-18UT 1.33 1.33 1.33 18-21UT 1.67 1.67 1.67 21-00UT 1.67 1.33 1.33 Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast. B. NOAA Solar Radiation Activity Observation and Forecast Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was below S-scale storm level thresholds. Solar Radiation Storm Forecast for Jul 09-Jul 11 2025 Jul 09 Jul 10 Jul 11 S1 or greater 1% 1% 1% Rationale: No S1 (Minor) or greater solar radiation storms are expected. No significant active region activity favorable for radiation storm production is forecast. C. NOAA Radio Blackout Activity and Forecast Radio blackouts reaching the R1 levels were observed over the past 24 hours. The largest was at Jul 09 2025 0425 UTC. Radio Blackout Forecast for Jul 09-Jul 11 2025 Jul 09 Jul 10 Jul 11 R1-R2 35% 35% 35% R3 or greater 1% 1% 1% Rationale: Solar activity is expected to be low with a further chance for M-class flares (R1-R2/Minor-Moderate) on 09-11 Jul.