Area Forecast Discussion
Issued by NWS Sacramento, CA

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FXUS66 KSTO 202052
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
152 PM PDT Sun Aug 20 2017

.SYNOPSIS...
Temperatures near to slightly above normal through the upcoming
week. Afternoon showers and thunderstorms possible over the
mountains through Wednesday.

&&

.DISCUSSION...
First up for eclipse viewers in Norcal...skies still look to be
mostly clear Monday morning. However, some smoke/haze could linger
across far northern portions of the state due to numerous
wildfires still burning across Oregon and NW California.

In other news...upper level troughing will remain over NorCal
into mid-week as upper level low deepens off the SoCal coast. Low
will meander near the coast through Tuesday before opening up into
a trough and moving onshore Wednesday. This will continue to draw
moisture north into the area, with daily chances for afternoon
showers and thunderstorms across the mountains, possibly even the
coastal range by Monday. Thunderstorms look to be most numerous on
Tuesday with more widespread activity across higher terrain. Any
storm will be capable of producing small hail and locally heavy
downpours. A few could be strong.

Onshore flow will lead to cooling over the next several days with
highs back down to within a few degrees or normal by Tuesday and
Wednesday. Decent marine layer should keep flow going through the
Delta with breezy winds in that vicinity and additional cooling.

CEO

&&

.EXTENDED DISCUSSION (Thursday THROUGH Sunday)
Quiet weather with warming temperatures is expected for the
extended period. A trough will be pushing to the east on Thursday
and then we will see a ridge build in for Friday and the weekend.
This will help to push highs back above average by 4-8 degrees for
the weekend. No precip is expected throughout the period.

-CJM

&&

.AVIATION...
VFR conditions expected the next 24 hours at the TAF sites. Local
MVFR is possible in the vicinity of KRDD due to HZ/FU. Scattered
t-storms over the Sierra through 03z Monday. Winds 5-11 knots
except in the Delta where gusts to 30 knots will be possible.

-CJM

&&

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

$$



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