279
FXUS66 KSTO 011016 CCA
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
214 AM PST Sun Dec 1 2024

.SYNOPSIS...
Expect cool, frosty, and locally foggy mornings through today.
Dry and mainly sunny skies continue through next week with a
gradual warming trend.

.DISCUSSION...
Dense fog has picked back up again, with many sites in the
southern Sacramento and northern San Joaquin Valley and the Delta
currently observing visibilities down to 1/4 mile. This fog is
expected to persist to at least 11am, though as with yesterday,
areas of fog could continue into the afternoon. As such, we have a
Dense Fog Advisory out through 11am today. There is potential for
overnight/morning fog several other days this week as well, with
the NBM showing a 10 to 30% probability of visibilities less than
1 mile tonight and into Monday morning in particular.

A weak short wave trough moves through the area today, though it
has little to no precipitable water associated with it so
conditions are expected to remain dry but with high clouds.
Otherwise, expect dry and mostly clear conditions through much of
next week. Temperatures will be gradually warming as ridging
continues over us, with Valley highs in the 60s, and upper 40s to
mid 50s at higher elevations.


.EXTENDED DISCUSSION (Thursday THROUGH Sunday)...
Upper ridging remains dominant synoptic feature over interior
NorCal through next week with near to slightly above normal high
temperatures. Ridge axis progresses through the CWA early Saturday
as upstream short wave troughing progresses. Models differ with
strength of this wave leading to some forecast uncertainty late in
the extended period. For now dry forecast continues through
Sunday with some local night/morning fog possible in the Central
Valley.

&&

.AVIATION...
Widespread MVFR/IFR with areas LIFR in BR/FG in Central Vly S of
KMYV southward til 21z and again aft 06z Mon. VFR conditions
elsewhere with sfc wind generally below 12 kts except lcl N-E sfc
wind up to 20 kts with gusts up to 30 kts in the N and E
fthills/mtns til 18z and again aft 05z Mon.

&&

.STO WATCHES/WARNINGS/ADVISORIES...
Dense Fog Advisory until 11 AM PST this morning for Carquinez
Strait and Delta-Northern San Joaquin Valley-Southern Sacramento
Valley.

&&

$$