Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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FXUS66 KHNX 281034
AFDHNX

Area Forecast Discussion
National Weather Service Hanford CA
334 AM PDT Wed Jul 28 2021

.SYNOPSIS...
Temperatures will be slightly above normal through the middle of
next week. Monsoonal moisture moving into the region will create
favorable conditions for daily showers and isolated thunderstorms
over the Sierra and through Saturday.

&&

.DISCUSSION...
Large area of high pressure over the central plains is nearly
stationary through Saturday. Slightly above normal daytime high
temperatures are expected through Saturday. SE flow will bring
sub-tropical moisture into the region providing enough moisture
for afternoon and evening thunderstorms through Saturday across
the Sierra and upper foothill locations.

Temperatures are forecast to remain nearly steady through the
remainder of the week. NBM guidance is a bit cooler on Friday.
Diurnal showers and thunderstorms are expected each day across
the Sierra and Kern county mountains and desert areas. Afternoon
clouds are possible across the SJV with SE flow aloft from
thunderstorms in the mountains. Closed low off the CA coast will
assist in feeding moisture northward over the region. There are
several weak embedded short waves that will aid in convection
development, even into the later hours.

Locally heavy rain and gusty winds will be associated with the
convection in the Sierra. Some storm may cross over burn scars
and could create some isolated flash flooding. QPF forecast is not
real impressive except for Friday. We are not expecting dry
lightning since the monsoon moisture field is very deep and we
have been seeing local amounts of up to one half of an inch with
some of the storms over the past few days.

&&

.AVIATION...
Showers and isolated thunderstorms likely after 18Z Wed until 03Z
Thur in the Sierra, primarily north of Sequoia National Park.
Otherwise, VFR conditions will prevail through the next 24 hours.

&&

.AIR QUALITY ISSUES...
On Wednesday July 28 2021... 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 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...JDB
aviation....JDB

weather.gov/hanford


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