869
FXXX10 KWNP 250031
DAYTDF

:Product: 3-Day Forecast
:Issued: 2026 Oct 25 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 Oct 25-Oct 27 2026 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Oct 25-Oct 27 2026

             Oct 25       Oct 26       Oct 27
00-03UT       2.00         3.00         1.67
03-06UT       3.00         2.00         1.33
06-09UT       3.00         2.00         1.33
09-12UT       3.33         2.00         1.33
12-15UT       4.00         2.00         1.33
15-18UT       3.33         2.00         1.33
18-21UT       4.00         2.00         1.67
21-00UT       3.00         2.33         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 Oct 25-Oct 27 2026

              Oct 25  Oct 26  Oct 27
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 Oct 25-Oct 27 2026

              Oct 25        Oct 26        Oct 27
R1-R2           10%           10%           10%
R3 or greater    1%            1%            1%

Rationale: There is a slight chance for an isolated R1-R2
(Minor-Moderate) radio blackout over 25-27 Oct.