Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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FXUS66 KHNX 181139
AFDHNX

Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
439 AM PDT Wed Apr 18 2018

.SYNOPSIS...Dry and mild conditions will continue today. Another
weather system will bring a chance of showers tonight and
Thursday along with breezy to windy conditions Thursday. Then dry
and warming significantly into early next week as high pressure
builds over the region,

&&

.DISCUSSION...
A swath of high clouds is pushing into central CA in advance of
the next low pressure system on track to impact our area. These
clouds are helping to hold our overnight temps up a few degrees
compared with 24 hrs ago. Highs today will be just a bit below
climo, and by this evening models suggest we should see some
precipitation beginning to develop over the Sierra north of Kings
Canyon.

As the system swings inland across California tonight and
Thursday we will see precipitation chances spread across our area.
There is only moderate moisture progged with this system and flow
will favor more orographically generated precip. This will mean
just slight chances for rain in the SJ Valley, with amounts
generally less than 1/10 of an inch. Amounts in higher terrain
will also be modest, generally less than 1/4 inch. Snow levels
with this relatively cool storm will start out around 5000-6000 ft
and lower to around 3500-4500 by later Thursday. Could see a few
flurries around pass level early Thursday morning but significant
snowfall accumulations are not expected across our area. Gusty
winds will develop with the passing system, with strongest winds
developing Thursday into Thursday evening through and below
mountain passes in Kern County on the backside of the system.

High pressure building behind the departing low pressure area
will return dry conditions with a significant warm up into early
next week. By Sunday, high temperatures will reach around 10-15
degrees above normal. Models show another developing northeast
Pacific trough by Tuesday, but there are differences in the
evolution and trajectory of this feature. Our current forecast
remains dry and warmer than normal into the middle of next week,

&&

.AVIATION...
Over the Southern Sierra Nevada, areas of MVFR and local mountain
obscuring IFR conditions developing in low clouds and precipitation
after 00Z Thursday. Otherwise, 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...JEB
avn/fw...DCH
synopsis...JEB

weather.gov/hanford



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