Product: Weekly Highlights and Forecasts
:Issued: 2025 Dec 01 0212 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC cweb ontact www.swpc.noaa.gov/content/subscription-services
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity 24 - 30 November 2025
Solar activity was at low levels over 24-27 and 30 Nov with C-class flare activity observed. High levels of solar activity were observed on 28 Nov when Region 4294 (S15, L=293, class/area=Fkc/1100 on 30 Nov) produced an impulsive M5.9 flare (R2-Moderate) at 28/2222 UTC, with Type-II (828 km/s) and Tenflare (240 sfu) radio emissions, as the region rotated onto the disk from the SE limb. Solar activity reached high levels again on 29 Nov with six M-class flares (R1-Minor) observed from Region 4294. No Earth-directed CMEs were detected during the summary period.
No proton events were observed at geosynchronous orbit.
The greater than 2 MeV electron flux at geosynchronous orbit was a normal to moderate levels on 24-27 Nov, with high levels observed on 28-30 Nov.
Geomagnetic field activity reached active levels on 24 Nov, and G1 (Minor) storm levels on 25 Nov, due to negative polarity CH HSS influences. Active levels were observed again on 26 Nov as negative polarity CH HSS influences subsided, followed by the onset of positive polarity CH HSS influences. Periods of G1 (Minor) storming were observed on 27 Nov, with periods of active conditions observed over 28-30 Nov, due to continued positive polarity CH HSS
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Forecast of Solar and Geomagnetic Activity 01 December - 27 December 2025
Solar activity is likely to reach moderate to high levels during the outlook period. M-class flares (R1-R2/Minor-Moderate) are likely, with a slight chance for X-flares (R3-Strong or greater), through 12 Dec due primarily to the flare potential of Region 4294.
There exists a slight chance for the greater than 10 MeV proton flux to reach S1 (Minor) solar radiation storm levels through 12 Dec, due primarily to the eruptive potential of Region 4294.
The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels on 01-06, 16-17, and 24-27 Dec. Normal to moderate levels are expected to prevail throughout the remainder of the outlook period.
Geomagnetic activity is likely to reach active levels on 03 and 06 Dec, and G1 (Minor) storm levels on 04-05 Dec, driven by influences from a negative polarity CH HSS. Additional G1 storm periods are likely on 13 Dec, with active levels likely on 14 Dec, again associated with negative polarity CH HSS effects. Active conditions
are likely on 21 Dec, followed by G1 storm levels on 22 Dec, in response to negative polarity CH HSS influences. Further G1 storm periods are likely on 23-26 Dec, with active levels likely on 27 Dec, due to positive polarity CH HSS influences. Quiet and quiet to unsettled conditions are expected to prevail throughout the
remainder of the outlook period.
Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2025 Dec 01 0212 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC web contact www.swpc.noaa.gov/content/subscription-services
#
# 27-day Space Weather Outlook Table
# Issued 2025-12-01
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2025 Dec 01 190 8 3
2025 Dec 02 190 5 2
2025 Dec 03 190 15 4
2025 Dec 04 190 25 5
2025 Dec 05 190 30 5
2025 Dec 06 190 12 4
2025 Dec 07 190 10 3
2025 Dec 08 190 8 3
2025 Dec 09 190 5 2
2025 Dec 10 185 5 2
2025 Dec 11 180 5 2
2025 Dec 12 180 8 3
2025 Dec 13 175 18 5
2025 Dec 14 175 12 4
2025 Dec 15 180 8 3
2025 Dec 16 180 5 2
2025 Dec 17 180 8 3
2025 Dec 18 180 10 3
2025 Dec 19 180 8 3
2025 Dec 20 175 8 3
2025 Dec 21 175 15 4
2025 Dec 22 175 20 5
2025 Dec 23 180 20 5
2025 Dec 24 190 25 5
2025 Dec 25 195 20 5
2025 Dec 26 195 20 5
2025 Dec 27 195 15 4
(NOAA)