999
FXXX10 KWNP 260031
DAYTDF

:Product: 3-Day Forecast
:Issued: 2025 Nov 26 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 5 (NOAA Scale
G1).
The greatest expected 3 hr Kp for Nov 26-Nov 28 2025 is 4.67 (NOAA Scale
G1).

NOAA Kp index breakdown Nov 26-Nov 28 2025

             Nov 26       Nov 27       Nov 28
00-03UT       3.67         4.67 (G1)    4.00
03-06UT       3.33         4.33         4.00
06-09UT       3.33         4.67 (G1)    3.67
09-12UT       3.67         4.00         3.67
12-15UT       3.67         3.67         3.67
15-18UT       3.00         3.67         4.00
18-21UT       3.33         4.00         4.00
21-00UT       4.67 (G1)    4.33         3.67

Rationale: G1 (Minor) geomagnetic storming is likely on 26-27 Nov due to
CH HSS effects.

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 26-Nov 28 2025

              Nov 26  Nov 27  Nov 28
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 Nov 26-Nov 28 2025

              Nov 26        Nov 27        Nov 28
R1-R2           15%           15%           15%
R3 or greater    1%            1%            1%

Rationale: There is a slight chance for R1-2 (Minor-Moderate) radio
blackouts due to M-class flare activity will remain through 28 Nov.