:Product: 3-Day Forecast
:Issued: 2026 Nov 07 1230 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
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 07-Nov 09 2026 is 5.00 (NOAA Scale
G1).

NOAA Kp index breakdown Nov 07-Nov 09 2026

             Nov 07       Nov 08       Nov 09
00-03UT       3.00         4.00         3.67         
03-06UT       2.33         3.00         4.00         
06-09UT       3.33         3.00         4.67 (G1)    
09-12UT       3.33         3.00         4.00         
12-15UT       3.00         3.33         2.67         
15-18UT       2.67         3.67         2.67         
18-21UT       3.67         4.67 (G1)    3.67         
21-00UT       4.67 (G1)    5.00 (G1)    4.67 (G1)    

Rationale: The geomagnetic field is likely to reach G1 (Minor)
geomagnetic storm levels, with a chance for G2 (Moderate) storm levels,
on 07-09 Nov due to anticipated influence from a negative polarity CH
HSS.

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 07-Nov 09 2026

              Nov 07  Nov 08  Nov 09
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 07-Nov 09 2026

              Nov 07        Nov 08        Nov 09
R1-R2           35%           35%           35%
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 activity, on 07-09 Nov.