Travis AFB, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

759
FXUS66 KSTO 162048
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
148 PM PDT Mon Sep 16 2024

.Synopsis...
Cooler unsettled weather thru mid-week with periods of showers
and isolated thunderstorms. Dry and warmer weather returns late in
the week into next weekend.

&&

.Discussion...
Our weather system continues its trek through Central CA into
Nevada with radar showing scattered showers along and east of the
Sierra with light snow showers over the higher peaks of the Sierra
south of HWY. 50. Showers and isolated thunderstorm will wrap
around and send showers into our area from the northern Sierra
moving southwestward but remaining mainly over the mountainous
areas north of I-80. NBM shows a 10-20% chance of thunderstorm
development with highest chances across the Southern Cascades and
adjacent foothills. With each pass of showers this evening,
active weather should trend eastward and eventually tapering off
and exiting our area by late tonight into early morning Tuesday.
0.01" to 0.30" is forecasted over the Sierra and Southern Cascades
with a 5-25% chance of seeing amounts over a quarter of inch.

Once things taper off Tuesday morning, we will see a brief break
in active weather ahead of another weather system moving in late
Tuesday through Wednesday. The weather system is tracking further
south than Sunday`s active weather, making the Sierra and adjacent
foothills the favored location for showers and thunderstorms. The
Sierra and adjacent foothills are slated to see around 0.25-0.60"
of rain, highest from I-80 southward. Elsewhere, amounts are under
a tenth, highlighting the chances for pop-up showers over the
Central Valley but not any organized and long duration rainfall. NBM
shows a 70-90% chance of rain amounts greater than 0.25" over the
Sierra with 50-70% across the adjacent foothills. Heaviest
rainfall is expected Wednesday morning, along the crest of the
Sierra.

Snow levels remain above pass level so is not expected to
accumulate on the roadways.

With the rounds of active weather, this pattern is keeping below
normal temperatures through midweek before things warm later this
week heading into the weekend. The beginning of this week
including today will see Valley highs in the 70s to upper 80s but
return back to normal temperatures (upper 80s, low 90s) by this
weekend.

Conditions remain relatively moist this week but with the late
week warmup, areas of the Northern Sacramento Valley will see
afternoon humidities drying back to around 20-30% Min. RHs.

.EXTENDED DISCUSSION (Friday THROUGH Monday)...
Dry weather expected through the extended forecast period as high
pressure extends inland over NorCal. High temperatures expected
to return to near normal Saturday into early next week. Each day
will see conditions dry in the Valley into next week and by Monday
see afternoon humidities around 20-30%

&&

.AVIATION...
In Northern Sac. Valley, isolated MVFR conditions possible at
times from shra til 03z Tue, otherwise mainly VFR next 24 hrs.
Surface wind generally below 12 kts except for Delta after 05Z
which the surface gust winds are upward to 20kts.

Over foothills and mountains, areas of MVFR/IFR possible from
isolated showers and thunderstorms creating mountain obscuration
thru 06z Tue. Snow levels above 7k ft. Local westerly surface
wind gusts to 20 kts possible over higher terrain through 00z
Tuesday.

&&

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

$$