Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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FXUS66 KHNX 181231
AFDHNX

Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
431 AM PST Mon Dec 18 2017

.SYNOPSIS...
High pressure will provide dry conditions over Central California,
with continued above normal afternoon highs and cool mornings
through Tuesday. A strong cold front will push across the region
on Wednesday with gusty winds and a chance for some precipitation.
Cold temperatures and dry conditions are expected Thursday through
next weekend. Friday morning will see the coldest temperatures,
with a possible hard freeze.

&&

.DISCUSSION...
Another chilly morning across central California as high pressure
aloft rebuilds behind the dry frontal system which blew threw the
region recently. Under the upper level ridge we will see lighter
winds with lows running a few degrees below normal, while
afternoon highs push to around 6-12 degrees above climo through
Tuesday.

Models prog the next cold frontal trough to drop south from the
Gulf of Alaska and reach our area by Wednesday. Agreement is good
on the track, timing and strength of this system as it pushes
through central California Wednesday. The result will be high
temperatures dropping back to near normal on Wednesday, with gusty
winds kicking up, especially across the mountain and desert areas
of Kern County and over the Sierra crest. There is not a
significant amount of moisture expected with this system but it
will provide a chance for some generally light precipitation
across most of the area Wednesday into Wednesday night.
Accumulating snow will mainly occur above 6000 ft and amounts will
be small, just a few inches forecast for the highest elevations of
the Sierra.

Much colder air will push into the region on northeasterly flow
behind this system. Guidance continues to indicate overnight lows
below freezing across most locations by Thursday morning and a
few degrees lower for Friday morning, when much of the SJ Valley
could see temperatures in the mid to upper 20`s.

After Friday, model solutions begin to spread, but consensus shows
another trough slipping southward through the region. Current
projections keep it mainly east of us and we maintain dry
conditions with frosty nights and seasonably cool days for next
weekend.

&&

.AVIATION...
Local MVFR conditions possible in parts of the San Joaquin Valley
through 1800z. Otherwise, VFR conditions will prevail across the
central California interior during the next 24 hours.

&&

.AIR QUALITY ISSUES...
On Monday December 18 2017... Fireplace/Wood Stove Burning Status
is: No Burning Unless Registered in Fresno... Kern... Kings...
Madera... Merced and Tulare Counties.
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.php for additional information
an/or to provide feedback.

&&

.HNX Watches/Warnings/Advisories...
NONE.
&&

$$

public...JEB
avn/fw...Molina
synopsis...JEB

weather.gov/hanford



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