Onyx, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

762
FXUS66 KHNX 260539
AFDHNX

Area Forecast Discussion
National Weather Service Hanford CA
1039 PM PDT Mon May 25 2026


.KEY MESSAGES...
1. Wind Advisory in effect 11 PM Monday to 11 AM Wednesday for
Indian Wells Valley, Mojave Desert Slopes, and Mojave Desert.

2. Lake Wind Advisory in effect until 5 PM Wednesday for Kern
River Valley, including Lake Isabella.

3. Dry conditions will allow the fire weather risk to remain in
place through this week.

4. Practice safety around lakes, rivers, and streams, as water
is still running cold.

5. Omega Block pattern will keep temperatures pleasant but
allow for dry lightning chances in the Sierra Nevada for the
next several days.

&&

.DISCUSSION...
Cooler and windy conditions are expected to continue as an
upper level disturbance drops into Northern California on
Tuesday. The associated surface cold front is already crossing
into Northern California this evening and expected south of
Central California by Tuesday afternoon. With this timing, will
see additional cooling on Tuesday along with strong winds over
the higher terrain of the region. Probability of Exceedance
(PoE) of reaching 85F-deg for the period from Tuesday through
Thursday is below 10 percent. This will lead toward afternoon
highs in the lower to mid 80s for the next several days. By
Friday, PoE of reaching 85F-deg does go up to 15 to 25 percent
as temperatures start a warming trend. While slow, the PoE of
reaching 95F-deg does not reach significant percentages until
the middle of next week.

With a significant onshore push of cooler air, enough of a
gradient will exist to generate strong winds over the Coastal
Range. By Tuesday, a Closed Low will position itself over the
Northern Sierra Nevada just north of Interstate-5. This position
of the upper low will support a more significant gradient over
Central California as strong winds develop over the higher
terrain of the Sierra Nevada, Tehachapi and Coastal Range. This
set-up will lead to cooling temperatures and locally strong
winds across Central California. Currently, the PoE of reaching
45 MPH will sit at 50 to 70 percent by Tuesday and mostly over
the Kern County Mountains. A Wind Advisory is in place for the
Eastern Portions of the Kern County Mountains, the Mojave
Slopes, as strong winds are expected toward the mid-week period.

The increased west wind will provide enough lift for the
continuation of afternoon convection across the higher terrain
of the Sierra Nevada on Tuesday. Ensembles keep measurable
precipitation near the Crest and taper percentages to near zero
over areas below 5,000 feet. Thunderstorm probabilities show
similar values over similar locations to that of measurable
precipitation.

While temperatures area still warm during this Holiday weekend,
water ways will be running cold. Exercise caution around lakes,
rivers, and streams as even the most experienced swimmers can
lose dexterity in cold water.

&&

.AVIATION...
VFR conditions prevailing across interior central California
for the next 24 hours.

&&

.AIR QUALITY ISSUES...
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...
Wind Advisory until 11 AM PDT Wednesday for CAZ337>339.

Lake Wind Advisory until 5 PM PDT Wednesday for CAZ332.

&&

$$

Public/Aviation....Molina

weather.gov/hanford