


Routine Space Environment Product Issued Weekly
Issued by NWS
Issued by NWS
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642 FXXX02 KWNP 190256 WEKFOR :Product: 27-day Space Weather Forecast :Issued: 2025 May 19 0221 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 May - 14 June 2025 Solar activity is expected to be at low levels, with a chance for R1-R2 (Minor-Moderate) events, over the outlook period. No proton events are expected at geosynchronous orbit. The greater than 2 MeV electron flux at geosynchronous orbit is likely to reach high levels on 19-23 May, 29 May - 05 Jun, and 14 Jun in response to recurrent coronal hole activity. The remainder of the outlook period is expected to be at normal to moderate levels. Geomagnetic field activity is likely to elevated above quiet levels for most of the next 27 days due to multiple, recurrent, coronal hole features. G2 (moderate) conditions are likely on 29 May and 13 Jun; G1 (minor) conditions likely on 19 May, 28 May, and 14 Jun; active conditions are likely on 30 May - 01 Jun, and 10 Jun; unsettled levels are likely on 20-23 May, 27 May, 02-07 Jun, and 11-12 Jun. Quiet conditions are expected for the few remaining days of the outlook period.