Atwater, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

480
FXUS66 KHNX 211904
AFDHNX

Area Forecast Discussion
National Weather Service Hanford CA
1204 PM PDT Sat Jun 21 2025


.KEY MESSAGES...
1. Red Flag Warning in effect for the Mojave Slopes and Desert,
the Indian Wells Valley, the West Hills and the San Joaquin
Valley until 5 AM on Sunday.

2. Major cool down Today into Sunday with humidities slowly
recovering. Better recovery occurring across the Sierra Nevada.

3. Strong Winds with gusts reaching between 45 and 60 mph. A
High Wind Warning is in effect for the Mojave Slopes through 2
AM Sunday and a Wind Advisory is in effect for the same time in
the Mojave Desert. Strong winds will also be observed over the
West Hills along the I-5 corridor.

&&

.DISCUSSION...
Deep trough digging over Central California is providing the
area with a significant cool-down. Yet, along with a drop in
temperatures, winds have seen a significant increase as strong
winds blanket Central California. The lack of moisture across
the region has also elevated the concerns of fire starts as
windy and dry conditions exist this Saturday. Both wind fire
weather products are in effect during trough passage with
conditions settling down on Sunday.

After having temperatures reach the century mark late in the
week, Probability of Exceedance (PoE) of reaching 90 degree will
remain at low percentages over the weekend as Valley
temperatures struggle to reach 90 degrees. PoE of 90 degrees
reaches the 50% mark by Monday and shows a steady claim during
the week. PoE of 100 degree hits the 50% mark on Thursday with
PoE of reaching 95 degrees at 80%-95%. Therefore, will expect
max temperatures to hover near 100 degrees later in the week and
into the weekend. While some uncertainty exist in the later
periods, will expect max temperatures to hit 100 degrees at the
more favored locations around the Friday and next Saturday time
frame.

Wind will remain an issue as the next disturbance is ready to
cross the district later today. Ensembles surface pressure
analysis is indicating the gradient from KSFO to KLAS reaching a
range of 16mb-19mb this afternoon. At these levels, wind
gusting to 50-60 mph have high confidence of occurring as PoE
values sit at around 70%-90% range. Therefore, will maintain the
High Wind products in place and extend the Red Flag Warning
through Sunday as humidity will be slow to rise during the
weekend. By Sunday afternoon, ensembles cut the gradient in half
as winds are expected to diminish. Afterward, the slow building
of the ridge pattern will keep winds down as temperatures take
center stage for the next warm-up later in the week.

&&

.AVIATION...
18Z Update:

VFR conditions will prevail for the next 24 hours across the
Central California Interior. A 70%-90% chance of surface Wind
G50KT across Kern County near KMHV and KIYK through 10Z to 12Z
Sunday. A 30% chance of G25KT across the San Joaquin Valley
between 02Z-08Z Sunday.

&&

.AIR QUALITY ISSUES...
ISSUED:  06/20/2025 14:52
EXPIRES: 06/21/2025 23:59
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.html for additional information
and/or to provide feedback.

&&

.HNX WATCHES/WARNINGS/ADVISORIES...
High Wind Warning until 2 AM PDT Sunday for CAZ338.
Wind Advisory until 2 AM PDT Sunday for CAZ337-339.
Red Flag Warning until 5 AM PDT Sunday for CAZ298-299.
Red Flag Warning until 5 AM PDT Sunday for CAZ579-580.

&&

$$

Public/Aviation....Molina

weather.gov/hanford