370
FXXX10 KWNP 041231
DAYTDF

:Product: 3-Day Forecast
:Issued: 2026 Nov 04 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 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Nov 04-Nov 06 2026 is 3.67 (below NOAA
Scale levels).

NOAA Kp index breakdown Nov 04-Nov 06 2026

             Nov 04       Nov 05       Nov 06
00-03UT       2.33         2.67         2.33
03-06UT       2.67         3.00         1.67
06-09UT       3.33         3.67         2.00
09-12UT       1.33         2.67         2.33
12-15UT       0.67         2.67         2.33
15-18UT       0.33         1.67         2.33
18-21UT       1.00         1.67         2.33
21-00UT       1.33         2.67         2.33

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 04-Nov 06 2026

              Nov 04  Nov 05  Nov 06
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

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Nov 04-Nov 06 2026

              Nov 04        Nov 05        Nov 06
R1-R2           25%           25%           25%
R3 or greater   10%           10%           10%

Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts,
and a slight chance for R3 (Strong) or greater blackouts all three days.