685
FXXX02 KWNP 180156
WEKFOR

:Product: 27-day Space Weather Forecast
:Issued: 2025 Aug 18 0120 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
18 August - 13 September 2025

Solar activity is expected to be at low levels, with a varying
chance for M-class flares (R1-R2/Minor-Moderate events), through 13
Sep.

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 21-22, 27-28 Aug, and 04-13 Sep.

Geomagnetic field activity is likely to reach G1 (Minor) storm
levels on 19 Aug, and active levels on 20 Aug, due to negative
polarity CH HSS influence. Active conditions are likely again on 28
Aug due to negative polarity CH HSS influence. Periods of G1-G2
(Minor-Moderate) storming are likely on 05 Sep, with active
conditions likely on 04 and 06 Sep, due to positive polarity CH HSS
influence. The remainder of the period is expected to be at quiet or
quiet to unsettled levels.