Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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FXUS66 KHNX 170945
AFDHNX

Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
245 AM PDT Thu Aug 17 2017

.SYNOPSIS...
Warming trend will continue into the coming weekend. However,
temperatures will remain close to normal. Chances of afternoon
and early evening showers and thunderstorms will be increased over
the Sierra crest areas for the next several days. A weak system
will bring another cooling trend beginning Sunday into the
beginning of next week.

&&

.DISCUSSION...
A fairly active pattern has developed over the eastern Pacific
with a parade of systems moving into western Canada and the
Pacific Northwest. For us here in central California not too much
to write home about, however these systems to the north will move
southward and skirt central California due to a strong central
conus high developing a blocky pattern giving these systems
nowhere to go but southward and then back northward back up into
central Canada. With a northerly flow present and the semi
permanent Pacific high located to the west of California over the
ocean temperatures will be kept in check with the lower synoptic
heights and will remain near normal. Temperatures aloft will be
cooler and allow for some instability and coupled with a little
orographic lifting will increase chances for afternoon and early
evening showers and thunderstorms over the Sierra crest areas over
the next several days.

A weak system from the north will begin moving into the region and
will bring another cooling trend to the area. Temperatures will be
slightly cooler than normal, especially with any marine intrusions
that will be likely with the onshore flow ahead of the systems
approach. Gusty winds around the coastal passes and for the Kern
county mountain passes and desert will be a sure bet with any of
these marine pushes and with the trough presence. This troughiness
will remain over the California airspace at least into the middle
of next week.

&&

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

&&

.AIR QUALITY ISSUES...
None.

&&

.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
an/or to provide feedback.

&&

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

$$

public...Andersen
avn/fw...Dudley
synopsis...Andersen

weather.gov/hanford



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