:Product: 3-Day Forecast
:Issued: 2025 Oct 24 0034 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 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Oct 24-Oct 26 2025 is 2.67 (below NOAA
Scale levels).

NOAA Kp index breakdown Oct 24-Oct 26 2025

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

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 Oct 24-Oct 26 2025

              Oct 24  Oct 25  Oct 26
S1 or greater    5%      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 Oct 24-Oct 26 2025

              Oct 24        Oct 25        Oct 26
R1-R2           10%           10%           10%
R3 or greater    1%            1%            1%

Rationale: A slight chance continues for isolated R1-R2 (Minor-Moderate)
radio blackouts through 26 Oct.