Lake Isabella, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

177
FXUS66 KHNX 090458
AFDHNX

Area Forecast Discussion
National Weather Service Hanford CA
958 PM PDT Tue Jul 8 2025

.UPDATE...
Updated Aviation Section.

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.KEY MESSAGES...
1. Temperatures near season averages across the region today before
a gradual warm up into the triple digits later this week.

2. Low RH values 15 to 25 percent will stretch across much of the
San Joaquin Valley and Sierra Nevada with values 5 to 10 percent in
the Mojave Desert. RH will decrease over the region later in the
week with warming temperatures.

&&

.DISCUSSION...
High pressure ridge pattern becoming the dominate feature over the
West Coast during the latter half the week. With this, will expect a
continuation of the warming trend as widespread triple digits will
be seen by Thursday and Friday. In addition to the rise in
temperatures, the ridge pattern will allow for monsoonal moisture to
surge northward as a potential for convection will exist across the
Mojave Desert later this week. With little change in the overall
pattern, will expect the duration of the heat wave to last from near
Friday through at least next Tuesday.

Ensemble Probability of Exceedance (PoE) of reaching 100 degrees
starts off below 30% over the next few days. Thursday marks the
transition period at which time the PoE jumps up to a range between
50% and 90%, with the higher end on the west side of the San Joaquin
Valley along the Interstate-5 corridor. Also, by Thursday, the Kern
Desert maxs out its PoE with values above 90% for the duration of
the period. Friday shows both the San Joaquin Valley and Kern Desert
having probabilities in the 90% and above range. At that point,
confidence in widespread triple digits increases for the start of
the next heat wave. Little change in PoE values observed through the
weekend as triple digits will be here to stay through the early part
of next week.

Ensemble Cluster analysis of Precipitable-Water is showing good
consensus in attempting to push monsoonal moisture northward toward
Central California later this week. While the southwesterly flow
aloft will hinder its surge toward Central California. Yet, ensemble
analysis does show a very slight chance of development toward Friday
and Saturday across the Kern Desert. Otherwise, dry and hot across
Central California with afternoon wind breezes over the favored
locations.

&&

.AVIATION...
06Z Update:

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

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.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...
None.

&&

$$

Public/Aviation....Molina/EW

weather.gov/hanford

weather.gov/hanford