Boron, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

140
FXUS66 KHNX 110444
AFDHNX

Area Forecast Discussion
National Weather Service Hanford CA
944 PM PDT Thu Jul 10 2025

.UPDATE...Updated Aviation section.

&&

.KEY MESSAGES...
1. A Heat Advisory has been issued for the San Joaquin Valley
and Sierra Nevada Foothills through early next week. 20 to 60
percent chance for greater than 105 degrees in the Valley Friday
and Saturday; 30 to 70 percent chance for Foothill areas to
exceed 100 degrees.

2. Low RH values 15 to 20 percent will stretch across much of
the San Joaquin Valley and Sierra Nevada with values 5 to 10
percent in the Mojave Desert. RH is expected to improve next
week, but with widespread values still 20 to 25 percent.

3. 50 to 90 percent chance for temperatures to exceed 105
degrees for much of the Kern Desert over the weekend; 45 to 75
percent chance for Inyokern and Ridgecrest to exceed 110 degrees
on Monday.

&&

.DISCUSSION...
An area of high pressure is building over southern California
today, starting a warming trend which will drive temperatures
above season averages. There is a 20 to 60 percent chance for
afternoon highs to exceed 105 degrees in the San Joaquin Valley
on Friday and Saturday, with localized areas up to 70 percent.
In addition, there is a 30 to 70 percent chance for highs to
exceed 100 degrees in the Sierra Foothills, including Lake
Isabella and Yosemite Valley. Minimum temperatures in the upper
60s for the valley areas, and the low to mid 70s in the foothill
areas, will pair with the triple digit heat to cause widespread
moderate heat risk for central California through the early part
of next week. As such, a Heat Advisory has been issued for a
large portion of the region, running from Friday morning through
late Tuesday evening.

The warming temperatures bring lowered relative humidity, with
widespread values 15 to 20 percent expected into the weekend;
desert values will continue to be in the single digits. This
will prolong dry conditions favorable for fire development,
however with subsiding air aloft associated with the area of
high pressure, winds will generally be light. The strongest
winds will be in typical wind-prone areas such as the Mojave
Desert Slopes, Lake Isabella, and Pacheco Pass, with the diurnal
cycle being the main driver.


&&


.AVIATION...
06Z Update:

VFR conditions will prevail for the next 24 hours across the Central
California Interior.

&&

.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...
Heat Advisory from 11 AM Friday to 11 PM PDT Tuesday for
CAZ300>322-324-325-332.
&&

$$

public/aviation...McCoy/BSO

weather.gov/hanford