Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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FXUS66 KHNX 151030
AFDHNX

Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
230 AM PST Mon Jan 15 2018

.SYNOPSIS...
Dry weather and milder than normal afternoon temperatures will
continue today across much of the central California interior.
A cold front will move southward across the area early 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...
A weak shortwave moved across the region Sunday and helped to
break up the stratus deck in the San Joaquin Valley in the
afternoon. Some high clouds moving across the district kept
visibilities above 2 mile most places in the Valley until midnight,
however as these high clouds moved east, fog and stratus once
again is developing. Expect patchy dense fog early this morning
with some stratus persisting into the afternoon before the
approaching low pressure system breaks it up once again.

The low pressure system is off the Pacific Northwest coast this
morning and will move inland across the Pacific Northwest and
northern California late tonight and early Tuesday. This system
just brushes across the northern portion of the CWA early
Tuesday, bringing a chance of light precipitation to the area
mainly Fresno county northward and favoring the Sierra near
Yosemite. Models have continued the trend of backing off on how
much precipitation we get from this system. It now looks like only
an inch or so of snow in the Sierra above 7000 feet near Yosemite
with lesser amounts south. In the San Joaquin Valley we will see
only a few hundredths of an inch, mainly near Merced.

The system moves east quickly Tuesday afternoon with dry weather
Tuesday night and Wednesday. Patchy fog is possible in the San
Joaquin Valley Tuesday night. Models are still on track with
bringing a colder, wetter system into central California beginning
Thursday afternoon in the north and spreading southward Thursday
night and Friday. Snow levels start out around 8000 feet Thursday
afternoon, then lower overnight as the colder air moves in. By
Friday afternoon the snow level lowers to near 3500 feet near
Yosemite to around 4500 feet in Kern County. Snow levels lower
near 2000 feet near Yosemite and around 3000 feet in the Kern
County mountains before the precipitation ends early Saturday
morning. These low snow levels may bring travel impacts in the
foothills and across the passes in Kern County Friday and Friday
night. At this time, it looks like we could see a foot of snow
over the higher elevations of the Sierra, with 1 to 4 inches of
snow possible in the Kern County mountains and a dusting in the
Sierra Foothills. As models refine the timing and amount of
precipitation, along with expected snow levels, winter weather
highlights will likely accompany this passing storm.

Models are still indicating yet another storm system to move into
the region early next week. However, there are still big
differences in the model timing and placement of this system. Will
wait and watch this system evolve.

&&

.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. A storm pushing into the area after 06Z Tuesday will
introduce precipitation with more widespread MVFR conditions and
local IFR. Otherwise, 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...Bean
avn/fw...Molina
synopsis...Bean

weather.gov/hanford


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