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000
FXUS66 KSTO 032124
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
224 PM PDT Mon Aug 3 2020


.SYNOPSIS...
Dry and seasonably hot weather continues across the region today.
Cooling returns Tuesday and continues through midweek. Warmer
weather returns for the weekend.

&&

.DISCUSSION...
Satellite imagery this afternoon depicts mainly clear skies over
interior northern California. Smoke from the StumpFire can be seen
on the visible channel as well, so hazy skies may be observed
across portions of northeastern California this afternoon.
Other than that, fairly quiet conditions will continue for the
rest of the day. Temperatures currently span the mid 90s to near
100 degrees for much of the Valley and may climb a few more
degrees this afternoon.

Tonight a broad trough will start to move into the region, which
will lead to falling heights on Tuesday. Onshore flow is expected
to increase Tuesday and Wednesday as the marine layer deepens,
beginning the cooling process inland. Delta Breeze influenced
areas are forecast to be around 10 degrees cooler Tuesday compared
to today, while the north end of valley won`t see much cooling
until Wednesday. May see some stratus work its way inland into
the Sacramento area Wednesday morning if the marine layer is able
to penetrate into the region. In addition to the cooling
temperatures and the potential relief from the marine layer, expect
breezy south to southwest winds for the Sacramento Valley and
north to northwest winds for the northern San Joaquin Valley.
Winds could lead to elevated fire weather concerns, so avoid
activities that could create a spark.

Additionally with the passage of the trough, there is a slight
chance for an isolated thunderstorm over northwest Shasta County.
Convective parameters look to be more favorable for areas north
and east (WFO Medford and Reno`s areas) of our county warning
area.

Wildfire smoke possible at times across the region the next few
days, especially north of Sacramento. Onshore flow expected to
bring considerably higher humidity inland by Wednesday and
Thursday.

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


Ensembles continue to depict broad troughing breaking down for the
weekend, which means we will see an increase in high temperatures.
Friday`s high temperatures are still forecast to be near the
seasonal averages with Valley highs generally spanning the 90s and
the mountains and foothills topping out in the upper 60s to upper
80s. Temperatures rise another 2 to 5 degrees for the weekend and
early next week with Valley highs in the mid 90s to 103 and 70s
to 90s in the mountains and foothills. Although onshore flow will
be weaker than midweek, a moderate Delta Breeze will remain in the
nights which will keep morning lows mild around the southern
Sacramento Valley and portions of the northern San Joaquin Valley.


&&

.AVIATION...

VFR conditions next 24 hours. Local southwesterly surface wind
gusts 20-35 kts vicinity Carquinez Strait/West Delta, and local
gusts 10-20 kts elsewhere through 06Z Tuesday.
&&

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

$$