022
FXUS66 KSTO 292208
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
208 PM PST Sat Nov 29 2025


.KEY MESSAGES...

 - Dry conditions and possible periods of morning Valley and
   adjacent foothills fog and mist continue through Sunday

 - Below normal temperatures and low clouds continue in the
   Valley, Delta and lower foothills through Sunday, with sunny
   skies and above normal temperatures in the upper foothills and
   mountains

 - Decreasing chances for precipitation with just a slight chance
   of snow showers for the Sierra south of I-80 mid-week

 - Periodically breezy north to east winds expected late Sunday
   through Monday and again mid-week, strongest on Wednesday

&&

.DISCUSSION...

...Today - Sunday... A broad area of low clouds continues to
cover the Delta, Valley, and adjacent lower foothills this
afternoon as a strong inversion persists over the area. This
cloud coverage has kept temperatures quite cool in those areas
once again for today, 10-15 degrees below normal for this time of
year, while higher elevations have been sunny and seasonably mild.
The low clouds also greatly limited the development of fog last
night into this morning, with patchy dense fog mainly limited to
the lower Motherlode foothills and for portions of the northern
Sacramento Valley. This fog diminished by late morning, with some
mist and haze persisting into the afternoon. Dense fog may return
locally to some portions of the area this evening into Saturday
morning, likely the same areas as last night. The persistent low
cloud cover will likely be a limiting factor again for fog
development. Probabilities of fog (visibilities less than a half
mile) currently sit around 50 to 70 percent for the northern and
central Sacramento Valley and the lower foothills, while the
Delta, southern Sacramento Valley, northern San Joaquin have
probabilities around 30 to 50 percent. Aside from periodic fog
development and low clouds, cool Valley/Delta temperatures and dry
weather are expected to persist through Sunday.

...Next Week... Breezy north to east winds will be possible
late Sunday into Monday, around 15 to 20 mph in the Valley, with
the strongest wind gusts up to 30 to 40 mph expected along the
Sierra. With a more persistent offshore(north-east) wind pattern
setting up early next week, fog and low cloud development is
expected to be less relative to this past week. More normal
temperatures are expected with increased sunshine over the
Valley. Ensemble guidance then indicates increasing confidence for
an inside slider type system dropping into the Great Basin,
bringing the potential for breezier north to east winds. Gusts
have trended a little stronger, 25 to 35 mph over the western side
of the Valley, up to 45 mph over the Sierra. There remains a
slight chance for mountain snow showers over the Sierra south of
I-80, but moisture looks very limited with this system so even
high elevations should see just a dusting of snow.

&&

.AVIATION...
Mist lingers through the afternoon hours, with improvements to
ceilings and visibility by the evening. During the evening
ceilings reaching MVFR, but go IFR/LIFR later in the evening and
overnight as the fog redevelops in the Valley. Light and variable
winds will continue through the TAF period. Near the end of the
TAF period, winds will start to shift toward the north at 5-10kts
helping to improve ceilings, visibility, and cloud coverage.

&&

.STO WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$