Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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FXUS66 KHNX 121037
AFDHNX

Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
337 AM PDT Sat Aug 12 2017

.SYNOPSIS...Seasonable temperatures through the weekend with a
cooling trend early next week.

&&

.DISCUSSION...Little to no change in the weather pattern over the
weekend compared to the past few days with seasonable temperatures
and dry weather expected.

An upper trough impacting the Pacific Northwest and northern
California will dig south into southern California Monday and
Tuesday resulting in a cooling trend. There is still quite a bit
of discrepancy between the models as far as how much cooling we
will actually see. The official forecast calls for temperatures
generally between 3 and 5 degrees cooler than normal on both
Monday and Tuesday. However...some outliers indicate temperatures
will be around 3 degrees cooler than the forecast. Either
way...much of the San Joaquin Valley will see temperatures in the
low to mid 90s early next week.

Unfortunately the cooling will be short lived as upper level high
pressure over the eastern Pacific begins building east over
California Wednesday into the weekend. This will result in a
warming trend...with the potential for triple digits in the valley
as early as Thursday.

The medium range models are indicating a possible return of
monsoonal activity over the Sierra Nevada late next week. We have
introduced a slight chance of thunderstorms over the mountains
and will continue to monitor this closely and refine timing over
the next few days.

&&

.AVIATION...
VFR conditions will prevail across the central California interior
during the next 24 hours.

&&

.AIR QUALITY ISSUES...
On Saturday August 12 2017... Unhealthy for sensitive groups in
Fresno County and Sequoia National Park and Forest.
Further information is available at Valleyair.org

&&

.CERTAINTY...

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
www.weather.gov/hnx/certainty.php for additional information
and/or to provide feedback.

&&

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

$$

public...Riley
avn/fw...DS
synopsis...Riley

weather.gov/hanford


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