Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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000
FXUS66 KHNX 250851
AFDHNX

Area Forecast Discussion
National Weather Service Hanford CA
151 AM PDT Wed May 25 2022


.SYNOPSIS...
A Heat Advisory is in effect for the lower elevations today as
temperatures warm up to around 15 to 20 degrees above normal.
Widespread triple digit heat will occur across the San Joaquin
Valley with a few record highs possible. Slight cooling will
occur Thursday then more noticeable cooling is expected Friday
through the holiday weekend with temperatures falling a little
below normal on Sunday and Monday. Dry weather will persist for
at least the next seven days.

&&

.DISCUSSION...
High pressure over the eastern Pacific will build inland today
bringing further warming. Afternoon temperatures are forecast to
be around 15 to 20 degrees above climatological averages for this
time of the year. Widespread triple digit heat will occur across
the San Joaquin Valley today with potential for record highs at
a few locations. The latest probabilistic guidance gives most of
the SJ Valley a 60-70% chance of reaching 100 degrees or above
today. Madera has a 45% chance of tying or breaking the record
high of 101 degrees today. Fresno has a 50% chance of tying or
breaking the record high of 102 degrees today. Hanford has a 24%
chance of tying or breaking the record high of 103 degrees today.
This will be the first day of triple digit heat so far this year,
creating dangerous conditions for heat sensitive people and for
those who are new to the area. A Heat Advisory remains in effect
for the San Joaquin Valley, the lower Sierra Foothills, and the
Kern River Valley today from 7 AM until 11 PM.

The ridge shifts to the east over the Rockies on Thursday as an
upper trough approaches the Pacific Northwest coast. Temperatures
will cool a little but will remain around 10 to 15 degrees above
normal. Most of the SJ Valley is forecast to be in the upper 90s
Thursday but some areas from Fresno County south may still reach
the century mark. More pronounced cooling will occur Friday and
Saturday as additional s/wv energy deepens the trough across the
west. Highs are forecast to be around 4 to 7 degrees above normal
on Friday then near normal on Saturday. There is good agreement
among model ensembles with another trough dropping down from the
Gulf of Alaska on Sunday then digging down over SoCal on Monday.
Highs are forecast to be around 3 to 6 degrees below normal on
Sunday then as much as 10 degrees below normal on Memorial Day.
Warming back to near normal is forecast on Tuesday as the trough
shifts east and heights begin to rebound.

Winds will become breezy on Thursday as onshore gradients begin
to ramp up from the approaching trough. Windy conditions develop
in the Kern County Mountains and Desert this weekend. Wind gusts
to around 55 mph are probable along the Mojave Desert Slopes and
could reach High Wind Warning criteria both Saturday and Sunday.

&&

.AVIATION...
VFR conditions will prevail throughout the Central California
interior for at least the next 24 hours.

&&

.AIR QUALITY ISSUES...
On Wednesday May 25 2022...Unhealthy for sensitive groups in 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...
Heat Advisory from 7 AM this morning to 11 PM PDT this evening
for CAZ301>307-309>317-319-321-332.

&&

$$

Public/Aviation/Fire Weather...DCH
PIO/DSS........................Meadows

weather.gov/hanford


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