117
FXXX12 KWNP 270031
DAYDIS

:Product: Forecast Discussion
:Issued: 2026 Sep 27 0030 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/wwire.html
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#             Forecast Discussion
#
Solar Activity

.24 hr Summary...
Solar activity reached low levels. Region 4534 (N10W90, Cro/beta)
produced a C3.1 flare at 26/1655 UTC, along with two C1 flares, as it
rotated out of view on the west limb. The seven active regions with
spots were stable or in decay. No Earth-directed CMEs were detected in
available coronagraph imagery.

.Forecast...
Solar activity is likely to reach low levels with a slight
chance for an M-flare (R1-R2/Minor-Moderate) on 27-28 Sep. Solar
activity is expected to decrease to very low levels on 29 Sep.

Energetic Particle

.24 hr Summary...
The greater than 2 MeV electron flux reached high levels this period.
The greater than 10 MeV proton flux was steady at background levels.

.Forecast...
The greater than 2 MeV electron flux is expected to reach high levels on
27-29 Sep. The greater than 10 MeV proton flux is expected to remain at
background levels through 29 Sep.

Solar Wind

.24 hr Summary...
The solar wind environment remained mildly enhanced as CH HSS influences
weakened. Total field strength reached 7 nT, and the Bz component varied
between +/-5 nT. Solar wind speeds gradually declined from a peak of
around 500 km/s to around 450 km/s by the end of the period. The phi
angle became variable after 26/1100 UTC.

.Forecast...
The solar wind environment is expected to gradually return to background
levels on 27 Sep, and persist at background levels through 29 Sep.

Geospace

.24 hr Summary...
The geomagnetic field was at quiet to active levels under diminishing CH
HSS influences.

.Forecast...
The geomagnetic field is expected to be at quiet to unsettled levels on
27 Sep as CH HSS influences subside. Mostly quiet geomagnetic conditions
are expected to prevail on 28-29 Sep.