3-Day Forecast

Issued: 2025 May 24 1230 UTC
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center and processed by SpaceWeatherLive.com

A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 2 (below NOAA Scale levels).

The greatest expected 3 hr Kp for May 24-May 26 2025 is 3 (.67below NOAA Scale levels).

NOAA Kp index breakdown

             May 24       May 25       May 26
00-03UT       1.67         2.00         2.00     
03-06UT       1.33         2.33         2.33     
06-09UT       1.67         3.00         3.00     
09-12UT       1.33         3.67         3.67     
12-15UT       3.00         3.00         3.00     
15-18UT       2.33         2.33         2.33     
18-21UT       2.67         2.33         2.33     
21-00UT       3.67         1.67         1.67     

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 May 24-May 26 2025

              May 24  May 25  May 26
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

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for May 24-May 26 2025

              May 24        May 25        May 26
R1-R2           25%           25%           25%
R3 or greater    5%            5%            5%

Rationale

A chance remains for R1/R2 (Minor/Moderate) radio blackouts through 26 May.