Routine Space Environment Product Issued Weekly
Issued by NWS
Issued by NWS
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263 FXXX02 KWNP 170126 WEKFOR :Product: 27-day Space Weather Forecast :Issued: 2026 Aug 17 0058 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 17 August - 12 September 2026 Solar activity is expected to range from very low to low levels throughout the outlook period, with a slight chance for an R1-R2 (Minor-Moderate) event. 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 19-20, 23-24, and 28 Aug. Normal to moderate levels are expected to prevail throughout the remainder of the outlook period. Geomagnetic field activity is expected to reach active levels on 17-18 Aug due to the anticipated arrival of a CME that left the Sun on 14 Aug. Active conditions are expected again on 21-22 Aug and 04 Sep due to the influences of a CH HSS. Quiet and quiet to unsettled conditions are expected to prevail throughout the remainder of the outlook period.