Placerville, CA (near 1,850 ft. elevation - 95667)

Wx Discussion - Wx Hazards - Wx Special Statements

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Weather Forecast Discussion

000
FXUS66 KSTO 021003
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
203 AM PST Fri Dec 2 2022

.SYNOPSIS...
Very cold morning with dense fog in the foothills and valley this
morning then clear and cold. A second winter storm with more
heavy snow will move into the region over the weekend. Cold and
dry weather returns next week.

&&

.DISCUSSION...
The storm has pushed south and east of the area. Behind the
system has set up for a very cold morning today with temperatures
mainly lowering into the upper 20s to lower 30s in the valley and
teens and 20s for the mountains with some of the colder mountain
valley lowering into the single digits. There will also the likely
hood of dense fog developing this morning from the central
Sacramento valley southward including the eastern foothills. Have
expanded the dense fog advisory to include the foothills as a
result.

The next system looks to start to move into the region on
Saturday and Sunday. A storm system dropping south from the Gulf
of Alaska still looks like it may absorb some moisture from the
southwest into the region on Saturday and bring the potential for
some precipitation. The main part of the system is still on track
to move into the region on Saturday night into Sunday. Snow
levels will initially be low for the western slopes with snow
flurries or light showers possible near 3000 feet but will then
rise during the day to near 7000 feet by early evening. Warmer
air advects into the region during the day ahead of the main storm
but will then lower to 3500 to 4500 feet during the day on Sunday
as the next system enters the region. This system is starting to
look less potent than the last one so forecasted amounts are still
questionable at this time. Enough instability is indicated Late
Sunday and Sunday night that a few thunderstorms may be possible
over the interior. The low pressure area is expected to linger
over the region Monday into Tuesday with lingering showers
possible.

&&
.EXTENDED DISCUSSION (Tuesday THROUGH Friday)...

Tuesday models are indicating the potential for some lingering
showers with the low pressure area lingering around Northern
California. NBM currently is keeping it dry on Tuesday so some
uncertainty there. Models are indicating a dry pattern Wednesday
and Thursday as the low moves away from the region. Cold mornings
in the valley with 30s forecasted and teens and 20s for the
mountains. Still some uncertainty on timing for a system late
next week around Thursday night and Friday but at least its
looking better for a potential system moving into the area.

&&

.AVIATION...

MVFR/IFR/LIFR conditions possible in the southern/central
Sacramento Valley, northern San Joaquin Valley, and adjacent
foothills for BR/FG through 19Z Friday. Surface winds generally at
or below 12 kts.


&&

.STO WATCHES/WARNINGS/ADVISORIES...
Winter Storm Watch from Saturday morning through late Sunday
night for Burney Basin / Eastern Shasta County-Mountains
Southwestern Shasta County to Western Colusa County-Shasta Lake
Area / Northern Shasta County.

Dense Fog Advisory until 10 AM PST this morning for Carquinez
Strait and Delta-Central Sacramento Valley-Motherlode-Northern
San Joaquin Valley-Southern Sacramento Valley-West Slope
Northern Sierra Nevada.

Winter Storm Watch from late tonight through late Sunday night
for West Slope Northern Sierra Nevada-Western Plumas
County/Lassen Park.

&&

$$

Hazardous Weather Outlook

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