Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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FXUS66 KHNX 261040
AFDHNX

Area Forecast Discussion
National Weather Service Hanford CA
340 AM PDT Mon Oct 26 2020


.SYNOPSIS...A cooling trend will continue over the next few days.
Temperatures will run below normal through Tuesday. A heightened
fire danger will exist over the mountains into Tuesday due to
locally gusty winds and low humidity. A warm up is expected by the
middle of next week.

&&

.DISCUSSION...
Some clouds over the foothills of the Tehachapi Mountains due to
upslope wind flow. Otherwise clear and dry in the central CA
interior. Models show any cloud cover should clear by mid morning
with no precipitation expected. Water vapor images show a trough
moving through the Great Basin bringing a colder and drier airmass
over much of CA. Dew points have lowered into the teens in the
north central valley and in the single digits in the Mojave desert
area. Along with the dry conditions, building surface high
pressure in the high desert will bring strong NE offshore winds
today. Some locations already reporting north winds gusting 40-50
mph in the mountain passes of the Indian Wells Valley. Higher
resolution models prog the stronger offshore winds this morning
across the sierra. East to west oriented basins should see breezy
conditions into the foothills this morning with stronger gusty
winds into this afternoon over the higher ridges of the sierra.
Strong wind potential diminishes this evening as the low moves
further away into AZ. The dry airmass and offshore wind will
result in dangerous fire weather conditions for the Sierra Nevada
and Kern County mountains and desert areas. Many locations in the
desert and higher elevations will see relative humidities drop to
the single digits. This drier air will help to efficiently radiate
energy and overnight lows Tuesday morning will be quite cool,
with most locations about 5 degrees below normal levels. Lower
elevations in Kern county desert could see low temperatures lower
below freezing Tuesday morning.

By early Tuesday morning the upper trough will continue moving
eastward toward the Texas panhandle region allowing an eastern
Pacific ridge to begin building into the region. This will allow
a warming trend to begin on Wednesday and temperatures will get
near to above normal levels by the end of the week. By next
weekend models look to bring another weak low pressure system into
the region however confidence in exact timing and placement is
not high at this time.


&&


.AVIATION...
Local MVFR/IFR visibilities can be expected in smoke and haze
over the Sierra during the next 24 hours. VFR conditions will
otherwise prevail over the central California interior during this
time.

&&

.AIR QUALITY ISSUES...
Please see SFOAQAHNX for an Air Quality Alert

On Monday October 26 2020... Unhealthy for sensitive groups in
Merced County.
Further information is available at Valleyair.org


&&

.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
an/or to provide feedback.

&&

.HNX WATCHES/WARNINGS/ADVISORIES...
Red Flag Warning until 5 PM PDT Tuesday for CAZ298-299-590>597.

&&

$$

public...MV
aviation....Durfee

weather.gov/hanford


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