:Product: 04260030three_day_forecast.txt :Issued: 2014 Apr 26 0030 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 Apr 26-Apr 28 2014 is 2 (below NOAA Scale levels). NOAA Kp index breakdown Apr 26-Apr 28 2014 Apr 26 Apr 27 Apr 28 00-03UT 2 2 2 03-06UT 1 1 1 06-09UT 1 1 1 09-12UT 1 1 1 12-15UT 1 1 1 15-18UT 1 1 1 18-21UT 2 2 2 21-00UT 2 2 2 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-13 over the past 24 hours, was below S-scale storm level thresholds. Solar Radiation Storm Forecast for Apr 26-Apr 28 2014 Apr 26 Apr 27 Apr 28 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 R3 levels were observed over the past 24 hours. The largest was at Apr 25 2014 0030 UTC Radio Blackout Forecast for Apr 26-Apr 28 2014 Apr 26 Apr 27 Apr 28 R1-R2 20% 15% 5% R3 or greater 1% 1% 1% Rationale: No R1 (Minor) or greater radio blackouts are expected. No significant active region flare activity is forecast.