623
FXUS66 KSTO 302053
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
1253 PM PST Sun Nov 30 2025



.KEY MESSAGES...

 - Dry conditions continue for the Valley and adjacent foothills
   with periods of morning mist and light fog

 - Below normal temperatures and low clouds continue in the
   Valley, Delta and lower foothills into Monday, with sunny skies
   and seasonable temperatures in the upper foothills and
   mountains. More sun and milder temperatures spread across the
   area for the rest of the week as low clouds diminish.

 - There is a slight chance of light high Sierra snow showers
   south of US Highway 50 for Wednesday

 - Some north to east winds expected tonight through Monday and
   again mid-week, becoming gusty on Wednesday

&&

...Today - Monday... There has been little change in the weather
pattern lately as 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 is
keeping temperatures quite cool in those areas once again, 10-15
degrees below normal for this time of year, while higher
elevations have been sunny and seasonably mild. Little change is
expected for Monday. The low clouds also have greatly limited the
development of dense fog overnight into this morning, with patchy
dense fog mainly limited to the lower Motherlode foothills and
briefly for portions of the northern Sacramento Valley. This fog
diminished by late morning, with some mist and haze persisting
into the afternoon. Patchy fog may return locally to some portions
of the area this evening into Monday morning. One change for
tonight is that northerly winds should limit fog development for
the northern Sacramento Valley. The persistent low cloud cover
will likely be a limiting factor again for dense fog development
elsewhere. Probabilities of fog (visibilities less than a half
mile) currently sit around 50 to 70 percent for the central
Sacramento Valley, the Delta and the lower foothills, while the
southern Sacramento Valley, northern San Joaquin have
probabilities around 30 to 40 percent. Some locally breezy north
to east winds will be possible late tonight into Monday, with
gusts to around 15 to 20 mph in the northern and far western
Sacramento Valley. Strongest wind gusts up to 30 to 40 mph are
expected along the Sierra.

...Tuesday - Friday...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 and Delta. Ensemble guidance indicates high confidence
for an inside-slider type system dropping into the Great Basin,
bringing the potential for breezier north to east winds late
Tuesday into Wednesday. Gusts around 25 to 35 mph are expected
over the western side of the Valley, up to 45 mph over the Sierra.
There remains a slight chance for light mountain snow showers
over the Sierra south of I-80, but moisture looks very limited
with this system and continues to trend downward.

&&


.AVIATION...
Potential for improving ceilings to VFR conditions across the
northern Sacramento Valley this afternoon. Lingering MVFR
conditions south of KRBL in low stratus through the afternoon,
with MVFR/IFR/LIFR conditions returning in areas of FG/BR and low
stratus cigs after 06z-10z Monday. Locally breezy northerly up to
15 kts across portions of the northern Sacramento Valley until
around 12z Monday. Northeast to east wind gusts up to 20-30 kts
developing along the Sierra 03z-18z Monday. Otherwise, light and
variable surface winds less than 12kts.

&&

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

$$