Routine Space Environment Product Issued Weekly
Issued by NWS
Issued by NWS
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254 FXXX02 KWNP 240156 WEKFOR :Product: 27-day Space Weather Forecast :Issued: 2025 Nov 24 0142 UTC # Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center # Product description and SWPC contact on the Web # https://www.swpc.noaa.gov/content/subscription-services # # 27-day Space Weather Forecast # Forecast of Solar and Geomagnetic Activity 24 November - 20 December 2025 Solar activity is expected to be expected to be at R1-R2 (Minor-Moderate) levels on 28-30 Nov and 01-11 Dec, primarily due to the flare potential and return of old Region 4274. Mostly C-class activity is expected on 24-27 Nov and 12-20 Dec. No proton events are expected at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at high levels on 28-30 Nov, 01-03 Dec, 08-12 Dec and 16-17 Dec, all due to coronal hole influence. The remainder of the outlook period is likely to be at normal to moderate levels. Geomagnetic field activity is expected to range from quiet to G1-G2 (Minor-Moderate) geomagnetic storm levels. G1-G2 (Minor-Moderate) levels are likely on 26-27 Nov and 03-04 Dec due to anticipated influence from CH HSS. Unsettled to active conditions are likely on 24-25 Nov, 28-30 Nov, 05-07 Dec, 12-14 Dec and 17-19 Dec. Mostly quiet levels are likely on 01-02 Dec, 08-11 Dec, 15-16 Dec and 20 Dec.