905
FXXX02 KWNP 060256
WEKFOR

:Product: 27-day Space Weather Forecast
:Issued: 2025 Oct 06 0233 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
06 October - 01 November 2025

Solar activity is expected to be low with a varying chance for
M-class flare (R1-R2/Minor-Moderate) activity throughout the 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 06-08 Oct, 13-16 Oct, 21-24 Oct,
28-31 Oct, and 01 Nov. Normal to moderate levels are expected to
prevail throughout the remainder of the period.

Geomagnetic field activity is likely to reach active levels on 06
Oct in response to continued positive polarity CH HSS influences.
Periods of G1 (Minor) storm levels are likely on 07-08 Oct due to
waning positive polarity CH HSS influences and the anticipated
arrival of two slow-moving CMEs that left the Sun on 03 Oct.
Negative polarity CH HSS influences are likely to result in periods
of G1 storming on 11 Oct, and active conditions on 12 Oct.
Additional negative polarity CH HSS influences are likely to produce
active conditions on 19 Oct, and G1 storming on 20 Oct. Periods of
active conditions are likely over 25-26 Oct due to negative polarity
CH HSS influences. Positive polarity CH HSS influences are
anticipated over 28-31 Oct, with active conditions likely on 28 Oct,
G1-G2 (Minor-Moderate) storm periods likely on 29 Oct, and G1
storming likely on 30 Oct. Periods of active conditions are likely
on 31 Oct as positive polarity CH HSS influences wane. Quiet and
quiet to unsettled levels are likely to prevail throughout the
remainder of the period.