Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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FXUS66 KHNX 232308
AFDHNX

Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
408 PM PDT Sun Jul 23 2017

.SYNOPSIS...
Temperatures will drop to around seasonal averages for a couple of
days, then back above normal for the remainder of the week. A
moist southerly flow will bring a chance of thunderstorms to the
mountains and Kern Deserts through Tuesday, with just a few
lingering storms possible over the Sierra crest Wednesday.

&&

.DISCUSSION...
A few thunderstorms have developed over the Sierra crest in
Tulare County this afternoon, a little earlier than yesterday as
moisture increases over the area. Temperatures are trending up,
with triple digit highs on track across the San Joaquin Valley.

Flow between a shortwave trough off northern CA and a weak upper
low over the Pacific to our southwest, as well as the ridge over
the southwest US is dragging some moisture across central CA.
Additional moisture is progged to spread north and westward around
the periphery of the ridge and will increase thunderstorm chances
over the mountain and desert zones Monday and Tuesday. As the
upper trough continues into northern CA, it should also help to
bring a slight decrease in temperatures during the next couple of
days.

As the upper low moves through the region it will turn the flow
more southwesterly and push moisture farther east. By Wednesday
there should be just a slight chance for lingering storms near the
Sierra crest.

For the latter part of the week into the weekend, the ridge is
progged to expand westward again and temperatures will trend back
upward to a few degrees above climo. There are some model
indications that moisture will also edge westward again, bringing
at least a slight chance for thunderstorms back to the high Sierra
by next Sunday.

&&

.AVIATION...
Areas of MVFR and local IFR visibilities in smoke from area
wildfires. Isolated thunderstorms near the southern Sierra crest
between 20Z today and 05Z Mon. Otherwise, VFR conditions will
prevail across the central CA interior during the next 24 hours.

&&

.AIR QUALITY ISSUES...
Please see SFOAQAHNX for Air Quality Alert.

On Monday July 24, 2017...Unhealthy for sensitive groups in Kern
County.

Further information is available at Valleryair.org

&&

.CERTAINTY...

The level of certainty for days 1 and 2 is low.
The level of certainty for days 3 through 7 is low.

Certainty levels include low...medium...and high. Please visit
www.weather.gov/hnx/certainty.php for additional information
an/or to provide feedback.

&&

.HNX Watches/Warnings/Advisories...
NONE.
&&

$$

public...JEB
avn/fw...Molina
synopsis...JEB

weather.gov/hanford


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