881
FXXX10 KWNP 301231
DAYTDF

:Product: 3-Day Forecast
:Issued: 2025 Nov 30 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 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Nov 30-Dec 02 2025 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Nov 30-Dec 02 2025

             Nov 30       Dec 01       Dec 02
00-03UT       4.00         1.67         1.33
03-06UT       4.00         2.00         1.33
06-09UT       2.33         1.33         1.67
09-12UT       3.33         1.33         1.33
12-15UT       2.67         1.33         1.33
15-18UT       2.00         1.00         1.33
18-21UT       1.00         1.33         1.67
21-00UT       1.00         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 Nov 30-Dec 02 2025

              Nov 30  Dec 01  Dec 02
S1 or greater    5%      5%      5%

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

Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Nov 29 2025 1607 UTC.

Radio Blackout Forecast for Nov 30-Dec 02 2025

              Nov 30        Dec 01        Dec 02
R1-R2           65%           65%           65%
R3 or greater   15%           15%           15%

Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely, with a
slight chance for an R3 (Strong) or greater event, on 30 Nov-02 Dec.