Routine Space Environment Product Issued Weekly
Issued by NWS
Issued by NWS
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317 FXXX02 KWNP 190156 WEKFOR :Product: 27-day Space Weather Forecast :Issued: 2026 Oct 19 0141 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 19 October - 14 November 2026 Solar activity is expected to predominately low with M-class flare probabilities ranging between a slight chance to a chance throughout the outlook period. No proton events are expected at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels on 23-27 Oct and 01-04 Nov, with normal to moderate levels likely the prevail throughout the remainder of the period. Geomagnetic field activity is likely to reach G1 (Minor) storm levels on 19-20 Oct and 31 Oct-01 Nov, with active conditions likely on 21 and 24 Oct and 09 Nov, due to CH HSS influences. Quiet and quiet to unsettled levels are expected to prevail throughout the remainder of the outlook period.