Routine Space Environment Product Issued Weekly
Issued by NWS
Issued by NWS
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822 FXXX02 KWNP 030426 WEKFOR :Product: 27-day Space Weather Forecast :Issued: 2026 Aug 03 0413 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 03 August - 29 August 2026 Solar activity is expected to be predominantly at low levels, with a chance for R1-R2 (Minor-Moderate) levels throughout the outlook period. No proton events (greater than 10 MeV) are expected at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels on 12-16 Aug and 22-23 Aug due to recurrent high speed streams. Normal to moderate electron flux levels are expected for the remaining days of the outlook period. Geomagnetic activity is expected to reach G1 (Minor) storming levels on 03 Aug (as the ongoing CME disturbances persist and wane) and on 19 Aug (due to the anticipated effects of a High Speed Stream originated in a negative polarity Coronal Hole). Active levels are expected on 17-18 Aug, due to the -CH HSS previously mentioned. Unsettled levels are expected on 04, 11-12 and 20 Aug, and Quiet levels on the remaining days of the outlook period.