Catheys Valley, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

293
FXUS66 KHNX 051812
AFDHNX

Area Forecast Discussion
National Weather Service Hanford CA
1012 AM PST Fri Dec 5 2025


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.KEY MESSAGES...
1. Fog and low clouds will continue each night and morning
across the San Joaquin Valley for the remainder of this week
into early next week. Dense fog will also develop at times in
the lower Sierra foothills, coastal ranges, and the Grapevine.

2. A gradual warming trend will occur in the mountains and
desert until next week, as the high pressure pattern continues
over the region.

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.DISCUSSION...
Model ensembles are in a strong agreement that the ridge of
high pressure will move onshore but remains strong and in place.
The subsidence often found in the ridges will help keep the
stratus and fog pattern going for a few more days which will
keep the San Joaquin Valley cooler than average. However, the
NBM is still showing 50 to 100 percent chances of high
temperatures cracking 50 degrees for the next week. The stratus
also will lead to fog over some of the passes including Pacheco
and Tejon Pass over the next few days.

However, eastern Kern County and the Sierra Nevada foothills
and mountains will have increasing temperatures with the ridge.
The desert area even has a 65 to 80 percent chance of highs of
at least 70 degrees by Wednesday of next week. The latest CPC
outlooks have the Valley, the Sierra Nevada, and the Mojave
Desert under a 70 to 90 percent chance of above average
temperatures due to the persisting ridge. However, the outlooks
show a shift from a 40 to 50 percent probability of below
average precipitation to a 33 to 40 percent probability of above
average precipitation for the much of the Valley and Sierra
Nevada.


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.AVIATION...
IFR visibilities are expected to persist through 21Z for much of
the Valley before improving to MVFR. MVFR to IFR ceilings will
continue through 21Z. After 21Z, there is a 50 to 95 percent
chance of MVFR to VFR ceilings through 6Z. After 6Z, MVFR to IFR
conditions will return. LIFR conditions are possible in the
foothills due to the low stratus deck.

&&

.AIR QUALITY ISSUES...
On Friday December 5 2025, Fireplace/Wood Stove Burning Status is:
No Burning Unless Registered in Fresno, Kern, Madera and Merced
Counties. Burning Discouraged in Kings and Tulare Counties, and
Kern (Greater Frazier Park Area) and Sequoia National Park and
Forest.


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.CERTAINTY...

The level of certainty for days 1 and 2 is medium.
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.

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.HNX WATCHES/WARNINGS/ADVISORIES...
Dense Fog Advisory until 1 PM PST this afternoon for CAZ300.
Dense Fog Advisory until 11 AM PST this morning for CAZ314-316-
335.
&&

$$

JPK

weather.gov/hanford