636
FXXX10 KWNP 011231
DAYTDF

:Product: 3-Day Forecast
:Issued: 2025 Nov 01 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 01-Nov 03 2025 is 4.33 (below NOAA
Scale levels).

NOAA Kp index breakdown Nov 01-Nov 03 2025

             Nov 01       Nov 02       Nov 03
00-03UT       3.00         3.00         2.67
03-06UT       3.00         2.33         3.67
06-09UT       2.67         2.00         3.00
09-12UT       2.67         4.33         2.67
12-15UT       3.67         3.33         2.33
15-18UT       2.67         3.00         2.33
18-21UT       2.67         2.33         2.00
21-00UT       3.33         3.33         2.67

Rationale: No G1 (Minor) or greater geomagnetic storms are expected.

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 01-Nov 03 2025

              Nov 01  Nov 02  Nov 03
S1 or greater    5%     10%     10%

Rationale: There is a slight chance for the greater than 10 MeV proton
flux to reach S1 (Minor) levels on 02-03 Nov due to returning active
regions.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Nov 01-Nov 03 2025

              Nov 01        Nov 02        Nov 03
R1-R2           25%           30%           30%
R3 or greater    5%           10%           10%

Rationale: Solar activity is expected to be low with an increasing
chance for M-class flares (R1-R2, Minor-Moderate) on 01-03 Nov and a
slight chance for X-class flares (R3, Strong) on 02-03 Nov due to the
return of old Regions 4246 (N24, L=290) and 4248 (N07, L=262).