Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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FXUS66 KHNX 211126

Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
426 AM PDT Mon Aug 21 2017

.SYNOPSIS...An area of low pressure will remain anchored off the
southern California coast through Wednesday and bring a chance of
mainly afternoon showers and thunderstorms to the Sierra each day
with a slight chance in the Kern mountains and desert today. A
dry westerly flow aloft will return by Thursday, with temperatures
warming through the weekend.


.DISCUSSION...A weak upper level low pressure area continues to
spin near the southern California coast. This is providing an east
to southeast flow across the region and helping to draw some
moisture into the region. Our area is progged to remain just west
of the deeper moisture and our skies should mostly be cloud free
during our partial solar eclipse this morning.

Thunderstorms will again develop over the Sierra this afternoon
and with a little additional moisture available, there is a slight
chance for some convection in the Kern County mountain and desert
areas as well. By Tuesday, models begin to pivot the upper low
eastward and it is forecast to push inland across the region on
Wednesday. This will shift the better moisture farther to the east
and thunderstorm chances will be limited to the higher Sierra
elevations north of Kern County. High pressure is then progged to
build in over the region behind the exiting trough, keeping dry
conditions in place through the beginning of next week.

Temperatures will remain near normal under the influence of the
nearby low pressure area through Wednesday. A significant warming
trend will then be on tap, with highs climbing to around 4-8
degrees above climo by the weekend.


.AVIATION... Isolated to scattered afternoon thunderstorms over the
mountains and desert from 20z Mon to 04z Tue. Otherwise VFR
conditions can be expected over much of the central CA interior
during the next 24 hours.


Please see SFOAQAHNX for an Air Quality Alert.




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

Certainty levels include low...medium...and high. Please visit for additional information
an/or to provide feedback.


.HNX Watches/Warnings/Advisories...


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