Onyx, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

884
FXUS66 KHNX 250500
AFDHNX

Area Forecast Discussion
National Weather Service Hanford CA
1000 PM PDT Tue Mar 24 2026



.KEY MESSAGES...
1. Temperatures will remain above average through the weekend.

2. Gusty winds will develop late Wednesday through early
Thursday morning along the Mojave Desert slopes and at times
through the weekend.

3. Practice cold water safety, as waterways will be running
cold and fast over the next several days.

4. Chances for precipitation and cooler temperatures return early
next week.

&&

.DISCUSSION...
Ensembles continue to show the ridge pattern weaken and flatten
further as the westerlies spread into the Northern California.
While probability of exceedance (PoE) of reaching 85 degrees
across the San Joaquin Valley is up to 40-65 percent on
Wednesday, they drop below 10 percent on Thursday. Its during
the Thursday time frame that a disturbance will cross Northern
California and introduce significant cooling and strong winds
across the Mojave Desert. While still above normal, temperatures
will bottom out in the lower 80s on Thursday. A wind advisory
is currently in effect for the Mojave Desert Slopes from
Wednesday Night through Thursday Morning.

The disturbance is expected pass the area by Friday as
temperature PoE show a increase in percentages back to the 60-80
percent range. While the PoE of reaching 90 degrees is around
40-60 percent for the south valley, temperatures will rebound
into the mid to upper 80s for the remainder of the week and into
the weekend. With only a weaker ridge pattern during the end of
the week and the weekend, ensembles are now showing a stronger
disturbance attempting to drop toward Central and Southern
California around the end of the month. While ensemble show the
onset of precipitation as early as Monday (March 30th), model
consensus is better on Tuesday with probability of measurable
precipitation reaching 50-70 percent just north of Kern County.
At the moment, the chance of receiving a tenth of an inch of
liquid precipitation is in the range of 3555 percent from
Fresno (City) northward with the higher probability percentages
over Merced and Mariposa Counties.

&&


.AVIATION...
VFR conditions are expected for the next 24 hours. Surface winds
increasing to G35KTS after 00Z Thursday across the Mojave Desert
Slopes.

&&

.FIRE WEATHER...
The cooling trend will continue across the region with
temperatures remaining above normal for the period. With the
ridge of high pressure continuing to shift east, will see
further cooling through Thursday before warming start on Friday.
Winds with remain light and terrain driven with breezy
conditions over the ridge-tops. Humidity recovery will see
improvements during the cool-down. No precipitation is expected
this through the weekend.

&&

.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 from 5 PM Wednesday to 5 AM PDT Thursday for
CAZ338.

&&

$$

Public/Aviation....Molina

weather.gov/hanford