Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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000
FXUS66 KHNX 202205
AFDHNX

Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
305 PM PDT Wed Sep 20 2017

.SYNOPSIS...
Below normal temperatures will continue this week with further
cooling on Thursday. Breezy conditions will continue through
Thursday with gusty winds through and below mountain passes.
Showers are possible over the mountains Wednesday night through
Friday with light snow above 8000 feet. A warming trend is
expected this weekend through the middle of next week with mostly
clear skies.
&&

.DISCUSSION...
A strong upper trough will push inland tonight and Thursday
bringing a re-enforcing shot of cooler air along with breezy
conditions through Thursday across most of our area. Highs in the
San Joaquin Valley Thursday will be 5 to 10 degrees cooler than
Wednesday, while Sierra and Kern desert locations will be 10 to
20 degrees cooler. This system will also bring another period of
breezy to locally windy conditions to the Kern County mountains
and desert as well as a brief shot of precipitation to the
Southern Sierra Nevada mainly north of Kings Canyon.

Precipitation amounts up to a quarter inch are possible in the
southern Sierra Nevada north of Kings Canyon. Snow levels are
expected to be around 11000 feet at the onset of precipitation
later this evening lowering to around 7000 feet by Thursday
afternoon. 1-2 inches of snow is possible along the higher peaks
in the southern Sierra Nevada.

The trough is progged to remain over CA on Friday as the main
upper low center lifts slowly northward. Temperatures will remain
much below normal on Friday and there will be enough instability
along the Southern Sierra crest Friday afternoon and evening for
a few snow showers.

Temperatures will recover over the weekend as the trough moves
east and high pressure builds inland. The medium range models are
in good agreement with an upper ridge strengthening over CA
through the middle of next week. This will result in temperatures
rising to slightly above normal values by next Tuesday. There is
little in the way of moisture from Saturday onward so expect dry
weather to prevail from the weekend through the middle of next
week.

&&

.AVIATION...
Showers spreading over the southern Sierra Nevada and Kern County
mountains after 00Z Thursday, bringing areas of MVFR and local
terrain obscurations. Otherwise, VFR conditions can be expected over
the Central CA interior during the next 24 hours.

&&

.AIR QUALITY ISSUES...
None.

&&

.CERTAINTY...

The level of certainty for days 1 and 2 is high.
The level of certainty for days 3 through 7 is high.

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...Bentzien
avn/fw...Lynott
synopsis...Bentzien

weather.gov/hanford


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