Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
643
FXXX10 KWNP 081231
DAYTDF
:Product: 3-Day Forecast
:Issued: 2025 Nov 08 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 6 (NOAA Scale
G2).
The greatest expected 3 hr Kp for Nov 08-Nov 10 2025 is 6.33 (NOAA Scale
G2).
NOAA Kp index breakdown Nov 08-Nov 10 2025
Nov 08 Nov 09 Nov 10
00-03UT 6.33 (G2) 4.67 (G1) 3.00
03-06UT 5.33 (G1) 3.67 4.67 (G1)
06-09UT 5.33 (G1) 3.00 5.67 (G2)
09-12UT 4.00 3.00 4.67 (G1)
12-15UT 4.67 (G1) 2.00 4.33
15-18UT 5.67 (G2) 2.33 3.67
18-21UT 4.67 (G1) 3.33 2.67
21-00UT 4.33 3.33 2.67
Rationale: G2 (Moderate) conditions are expected to persist through on
08 Nov with lingering CME/CH HSS influences, decreasing to active to G1
(Minor) levels on 09 Nov. Additional CME interactions are likely to
increase storm levels back to G1-G2 conditions on 10 Nov.
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 08-Nov 10 2025
Nov 08 Nov 09 Nov 10
S1 or greater 15% 15% 15%
Rationale: Due to the complexity and history of Region 4274, there
remains a slight chance of an S1 (Minor) radiation storm through 10 Nov.
C. NOAA Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
Radio Blackout Forecast for Nov 08-Nov 10 2025
Nov 08 Nov 09 Nov 10
R1-R2 75% 75% 75%
R3 or greater 30% 30% 30%
Rationale: R1/R2 (Minor-Moderate) radio blackouts are likely, with a
chance for isolated R3 (Strong) events on 08-10 Nov as the regions in
the eastern hemisphere remain active and magnetically complex.