Georgetown, California 7 Day Weather Forecast

Wx Discussion - Wx Hazards - Wx Special Statements

7 Day Weather Forecast

Weather Forecast Discussion

000
FXUS66 KSTO 160537
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
1036 PM PDT Fri Oct 15 2021

.SYNOPSIS...
Warm and dry weather continues into the weekend. Cooler weather
along with a chance of precipitation returns Sunday afternoon and
night. More unsettled weather mid to late week into next weekend.

&&

.DISCUSSION...
The Evening Update: Onshore flow will return by afternoon on Sat as
the ridge axis shifts Ewd into the 4-Corners region ahead of an
advancing Ern Pac trof. The trof/low pressure system will move
rapidly across Norcal Sun nite/early Mon. A vigorous vort max is
forecast to be embedded in the fast-moving trof which may result in
some relatively brief heavy showers on the NE quadrant of the vort
max Sun nite, impacting our NErn mtn ones. Some of the modeling is
hinting that there may be enough instability for a brief
thunderstorm or two as this vort max moves across Norcal. Timing of
this trof is gradually evolving around a similar speed or solution.
This system will bring windy conditions to the Sierra as it
approaches the CWA on Sun, and continuing Sun nite into Mon as the
system moves E of our area.    JHM

.Previous Discussion...

High pressure has built into NorCal and that is bringing pleasant
weather to end the week. Highs this afternoon will top out in the
lower 80s across the Valley and 60s and 70s over the higher
elevations. The upper level ridge and high pressure will begin to
track east on Saturday but will still be the main influence for
our weather bringing another great fall day. Highs will be similar
tomorrow to what we saw today but will be a bit warmer in the
higher elevations.

A quick moving short wave trough will then approach the area for
Sunday, this will bring changing conditions. Clouds will begin to
build in Saturday night and we should see light showers reach the
Coastal Range by late morning/early afternoon Sunday associated
with the cold front. Showers will continue to overspread the area
during the afternoon and evening as the cold front works east. The
cold front looks to clear the area by the mid evening but showers
are going to linger into Sunday night as the trough axis spins
through. This system will have some moisture to work with but
overall QPF totals will be low, generally less then 0.10" in the
Valley and 0.10" to 0.40" over the higher elevations. Snow levels
will be just under pass level Sunday but will start to fall
Sunday night falling to around 5500 feet early in the night. A
few inches of snow will be possible above 5500 feet with the
biggest snow impacts coming after the sun sets into the early
overnight Sunday.

Short wave ridging builds in on Monday but cool air will build in
behind the departing systems. This will bring a chilly day with
Valley highs only in the 60s and 40s and 50s in the higher
elevations.

-CJM

&&

.EXTENDED DISCUSSION (Tuesday THROUGH Friday)...
A shift to unsettled weather is expected for much of the extended
forecast. Clusters continue to indicate an initial wave ahead of
the main trough which will bring some precipitation chances to far
northern California Tuesday into Wednesday. With this push, the
best chances for precipitation will be in the higher elevations
north of Highway 50, with some slight chances in the Valley. From
here, the main deep trough remains relatively stagnant until late
Friday into the weekend when more widespread chances for
precipitation are expected throughout the entire area. Exact
timing and QPF amounts are hard to say at this time, as there is
quite a bit of difference in deterministic models. Overall, expect
a wetter and colder pattern to take hold for the end of next week
and keep up to date with the forecast.

&&

.AVIATION...
VFR conditions expected over the next 24 hours over interior
Northern California. Winds generally less than 10 kts.

&&

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

&&

$$

Hazardous Weather Outlook

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