528
FXXX02 KWNP 080226
WEKFOR

:Product: 27-day Space Weather Forecast
:Issued: 2025 Dec 08 0210 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
08 December - 03 January 2026

M-class flares (R1-R2/Minor-Moderate) are likely, with a slight
chance for X-class flares (R3/Strong or greater), through much of
the outlook period.

There is a slight chance for the greater than 10 MeV proton flux to
reach 10 pfu (S1-Minor) through much of the outlook period.

The greater than 2 MeV electron flux is expected to reach high
levels on 08-09, 12-13, 16-17, 25-29 Dec, and 01-03 Jan. Normal to
moderate levels are expected to prevail throughout the remainder of
the outlook period.

Geomagnetic field activity is likely to reach G1 (Minor) storm
levels on 08 and 10 Dec, with G2-G3 (Moderate-Strong) storming
likely on 09 Dec, due to the anticipated arrival and passage of a
CME that left the Sun on 06 Dec. Periods of G1 storming are likely
on 21-23 Dec in response to negative polarity CH HSS influences, and
again on 24-26 Dec under positive polarity CH HSS influences. Period
of G2 (Moderate) storms are likely on 30 Dec, with G1 storming
likely on 31 Dec, when negative polarity CH HSS influences are
anticipated.