457
FXXX10 KWNP 240031
DAYTDF

:Product: 3-Day Forecast
:Issued: 2026 Aug 24 0030 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 2026 is 1.67 (below NOAA
Scale levels).

NOAA Kp index breakdown Aug 24-Aug 26 2026

             Aug 24       Aug 25       Aug 26
00-03UT       1.67         1.67         1.67
03-06UT       1.67         1.67         1.67
06-09UT       1.67         1.33         1.67
09-12UT       1.33         1.33         1.33
12-15UT       0.67         1.33         0.67
15-18UT       1.33         1.33         1.33
18-21UT       1.67         1.67         1.67
21-00UT       1.67         1.33         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 Aug 24-Aug 26 2026

              Aug 24  Aug 25  Aug 26
S1 or greater   10%     10%     10%

Rationale: There is a slight chance for the greater than 10 MeV proton
flux to reach S1 (Minor) levels over 24-26 Aug.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Aug 24-Aug 26 2026

              Aug 24        Aug 25        Aug 26
R1-R2           45%           45%           45%
R3 or greater   10%           10%           10%

Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
and a slight chance for an isolated R3 (Strong or greater) event over
24-26 Aug.