MSGID: 1:18/200@fidonet 6691f275   
   PID: MBSE-FIDO 1.1.1 (Linux-x86_64)   
   CHRS: CP437 2   
   TZUTC: -0400   
   TID: MBSE-FIDO 1.1.1 (Linux-x86_64)   
   :Product: 3-Day Forecast   
   :Issued: 2025 May 27 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 May 27-May 29 2025 is 5.00 (NOAA Scale   
   G1).   
      
   NOAA Kp index breakdown May 27-May 29 2025   
      
                May 27       May 28       May 29   
   00-03UT       2.00         1.67         4.00   
   03-06UT       2.67         3.67         4.00   
   06-09UT       2.67         5.00 (G1)    3.33   
   09-12UT       1.67         4.67 (G1)    3.00   
   12-15UT       1.67         3.67         2.33   
   15-18UT       1.00         3.00         2.00   
   18-21UT       1.00         3.33         2.00   
   21-00UT       2.67         4.00         3.33   
      
   Rationale: G1 (Minor) or greater geomagnetic storms are likely on 28 May   
   due to CH HSS onset. 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 May 27-May 29 2025   
      
                 May 27  May 28  May 29   
   S1 or greater   15%     15%     15%   
      
   Rationale: There is a slight chance for the greater than 10 MeV proton   
   flux to reach S1 (Minor) levels over 27-29 May.   
      
   C. NOAA Radio Blackout Activity and Forecast   
      
   Radio blackouts reaching the R1 levels were observed over the past 24   
   hours. The largest was at May 26 2025 1306 UTC.   
      
   Radio Blackout Forecast for May 27-May 29 2025   
      
                 May 27        May 28        May 29   
   R1-R2           70%           70%           70%   
   R3 or greater   30%           30%           30%   
      
   Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely, with a   
   chance for isolated R3 (Strong or greater) events over 27-29 May.   
      
      
      
   --- MBSE BBS v1.1.1 (Linux-x86_64)   
    * Origin: Outpost BBS * Johnson City, TN (1:18/200)   
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