Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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000
FXUS66 KHNX 150026
AFDHNX

Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
426 PM PST Sun Jan 14 2018

.SYNOPSIS...
High pressure over the region will keep dry weather and milder
than normal afternoon temperatures through Martin Luther King Jr
Day across much of the central California interior, outside of
persistent foggy and cloudy areas in the San Joaquin Valley. A
cold front will move southward across the area on Tuesday bringing
a chance of light precipitation mainly from Fresno county
northward. A colder storm will bring rain and mountain snow to
the region Thursday through Friday.

&&

.DISCUSSION...
Strong surface high pressure in the Great Basin ahead of an
approaching Pacific low pressure system has been producing a
moderate easterly flow across our area. This has produced some
downsloping in the south end of the San Joaquin Valley helping to
mix out the stratus deck and warm temperatures a bit down there.
In addition, a weak shortwave impulse tracking into the west
coast has aided in breaking up the entrenched stratus deck over
the Valley. We are left with a mixed bag of remnant low clouds and
passing high and mid clouds ahead of the approaching system.

It looks like the mixing from the passing shortwave, along with
some mid/high level cloudiness should keep widespread dense fog
from developing overnight in the San Joaquin Valley tonight. Still
could see local patches of dense fog though. Tomorrow should be
another mild day across the area, in advance of the next incoming
system. Models have been trending farther north with this system
and it is expected to bring a chance for mainly light precip to
the Sierra zones late Monday night through Tuesday, as well as the
San Joaquin Valley from Fresno County northward. This should
otherwise have little effect on the area with mild temperatures
continuing through midweek.

Models remain on track with a colder and wetter system progged to
impact our area Thursday and Friday with lingering showers over
the mountains into Saturday. This colder storm will bring lower
snow levels and moderate precipitation. The bulk of the precip
will occur late Thursday night and Friday. With snow levels
falling as low as 3-4 thousand feet by Friday, there could be
travel impacts into the foothills and over the passes in Kern
County. Snow levels fall even lower into early Saturday with
lingering mountain showers. As model runs refine the timing and
amounts of precipitation, along with expected snow levels, winter
weather highlights will likely accompany this passing storm.
Much cooler temperatures can also be expected for next weekend
with the storm system.


&&

.AVIATION...
Widespread IFR conditions in low clouds and mist/haze will persist
in the San Joaquin Valley with areas of LIFR in fog between 06Z and
20Z Monday. VFR conditions will prevail elsewhere across the Central
CA Interior during the next 24 hours.

&&

.AIR QUALITY ISSUES...
On Monday January 15 2018... 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 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.php for additional information
an/or to provide feedback.

&&

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

$$

public...JEB
avn/fw...DS
synopsis...JEB

weather.gov/hanford



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