Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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803
FXUS66 KHNX 152345 AAA
AFDHNX

Area Forecast Discussion
National Weather Service Hanford CA
445 PM PDT Tue Oct 15 2019

.UPDATE...Updated air quality issues section.

&&

.SYNOPSIS...Dry weather will continue over the central California
interior for the next several days. High temperatures will run
slightly warmer than normal through Wednesday. Thursday will be
breezy to windy and much cooler. Temperatures will remain cooler
than normal Friday through the weekend.

&&

.DISCUSSION...
This just in...our sister office in Monterrey felt an estimated
5.0 magnitude earthquake just before 1 PM today. However, there
was no rumblings felt here at the Hanford weather office. That is,
other than those I am feeling in my stomach since I have yet to eat
my lunch. With current geologic and lunch schedule events out of
the way we can talk about the weather. Which for the next day or
so there really is not a whole lot to report other than continued
mostly clear skies and near normal high temperatures due to weak
ridging overhead.

Now, Thursday will be a much different story, as we have a
powerful eastern Pacific low that is currently in the Gulf of
Alaska, and will move south and eastward into the Pacific
Northwest. The storms associated cool front and pressure gradient
will however move southward into our region on Thursday. This will
bring gusty winds and cooler temperatures into our forecast area.
Right now temperatures are looking 8-12 degrees cooler on
Thursday than on Wednesday. Moisture will be lacking with this
system, however a few sprinkles or light showers would not be out
of the question for the northern parts of our CWA, especially in
the higher elevations of the Sierra in the Yosemite National park
area. Impact-wise, the winds will be the main player here. San
Joaquin Valley and coastal pass areas will see gusty winds with
this system and gusts near 25 mph will be possible. The strongest
winds will occur in the Kern County Mountain pass areas where
gusts up to 45 mph will be possible before winds begin weakening
early Friday morning.

Beginning Friday in the wake of the trough passage a
northwesterly flow aloft will be in place over the region and weak
impulses will move through the flow. The impulses will mainly
bring an increase in clouds but on Saturday one of the shortwave
troughs will move through the area and increase precipitation
chances for the higher elevations of the Sierra and once again the
greatest chances will be in the Yosemite locales. By the end of
the weekend Pacific ridging will begin building into the area and
increase temperatures back towards normal levels for the start of
next week.

&&


.AVIATION...VFR conditions can be expected over the central
California interior for at least the next 24 hours.

&&

.AIR QUALITY ISSUES...
On Wednesday October 16 2019... Unhealthy for sensitive groups
in Kern County.
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.html for additional information
an/or to provide feedback.

&&

.HNX WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

public...BSO/Andersen
aviation....Andersen

weather.gov/hanford



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