


Routine Space Environment Product Issued Weekly
Issued by NWS
Issued by NWS
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064 FXXX02 KWNP 290256 WEKFOR :Product: 27-day Space Weather Forecast :Issued: 2025 Sep 29 0238 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 29 September - 25 October 2025 Solar activity is expected to be at low levels with a likely chance for isolated M-class flares throughout the period. 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 05-08 Oct, 13-16 Oct and 21-24 Oct. Normal to moderate levels are expected for the remainder of the outlook period. Geomagnetic field activity is expected to be at unsettled to active periods on 29-30 Sep, 11-13 Oct, 19-22 Oct and 25 Oct, all due to negative polarity CH HSS influences. Unsettled to active periods are expected on 03-06 Oct due to positive polarity CH HSS influences. Mostly quiet levels are likely for the remaining days in the outlook period.