701
FXXX10 KWNP 241231
DAYTDF

:Product: 3-Day Forecast
:Issued: 2025 Aug 24 1230 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/wwire.html
#
#             3-Day Forecast
#
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 Aug 24-Aug 26 2025 is 3.67 (below NOAA
Scale levels).

NOAA Kp index breakdown Aug 24-Aug 26 2025

             Aug 24       Aug 25       Aug 26
00-03UT       2.00         3.00         3.67
03-06UT       1.67         2.00         3.67
06-09UT       1.33         2.00         3.67
09-12UT       1.00         2.67         3.00
12-15UT       1.33         2.67         2.67
15-18UT       1.33         2.67         2.00
18-21UT       1.67         2.67         1.67
21-00UT       1.67         3.67         2.67

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 Aug 24-Aug 26 2025

              Aug 24  Aug 25  Aug 26
S1 or greater   20%      5%      5%

Rationale: There is a slight chance for S1 (Minor) storm levels on 24
Aug.

C. NOAA Radio Blackout Activity and Forecast

Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Aug 23 2025 2006 UTC.

Radio Blackout Forecast for Aug 24-Aug 26 2025

              Aug 24        Aug 25        Aug 26
R1-R2           35%           45%           45%
R3 or greater    5%            5%            5%

Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
over 24-26 Aug.