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Area Forecast Discussion (AFD)

Issued by San Joaquin Valley, CA (HNX)

                            
000
FXUS66 KHNX 242233
AFDHNX

Area Forecast Discussion
National Weather Service Hanford CA
333 PM PDT Mon Jun 24 2019

.UPDATE...

Updated AIR QUALITY ISSUES section

&&

.SYNOPSIS...
Temperatures will trend slightly lower but remain above seasonal 
averages through Tuesday as high pressure over the region weakens.
Temperatures will then drop to below normal Wednesday through the
end of the week as a low pressure system moves across the Pacific
Northwest and pushes cooler air into the area. Conditions will 
remain dry through the period.

&&

.DISCUSSION...
Central California temperatures are generally running up a couple
of degrees from 24 hrs ago under weak ridging ahead of a 
developing trough approaching from the NE Pacific. Highs today are
on track to top out several degrees above climo, with many SJV and
desert locales reaching the triple digit mark. Skies are mostly 
sunny with just a few small CU popping over the Sierra and some 
high clouds drifting inland across the high pressure ridge.

The developing upper level low pressure center will swing slowly
inland near the Pacific Northwest during the next few days and
drag the associated trough across our region. This will bring a 
cooling trend through midweek as the trough pushes inland. 
Thursday will be the coolest day, with highs as much as 8-12 
degrees below normal for this time of year. Expect periods of 
increased gusty winds during the next few days as the system 
pushes across, especially through and below mountain passes, but
not expected to reach highlight criteria.

Models then prog weak high pressure to build into the region for 
the end of the week into early next week as the trough lifts out.
As a result, temperatures will trend gradually upward during the 
period but should only rebound to right around normal by Sunday 
and Monday.

The forecast remains dry throughout the week into next week, with
just occasional mainly high clouds and some afternoon buildups
over the mountains.

&&


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

&&

.AIR QUALITY ISSUES...
On Tuesday June 25 2019... Unhealthy for sensitive groups in
Fresno... Kern and Tulare Counties 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 high.

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...JEB
aviation....JEB

weather.gov/hanford