550 
FXUS66 KHNX 101151
AFDHNX

Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
451 AM PDT Wed Oct 10 2018

.SYNOPSIS...
Weak disturbances will bring cooler weather during the next couple
of days, with a chance of showers over the Southern Sierra Nevada
on Thursday. Dry conditions will prevail Friday into early next
week with temperatures warming to a few degrees above normal. 

&&

.DISCUSSION...
Satellite loops show an upper level low pressure center swinging
east away from the Great Basin area while shortwave energy drops
south along the west coast. Closer to the surface, marine stratus
extends inland to the coastal range with gusty winds blowing
through the passes.

The incoming impulses are progged to sharpen a northeast to
southwest oriented trough across our area today and Thursday, with
a closed low then forming off the coast of central California by 
Friday. Tropical system Sergio meanwhile is shown tracking
northeastward across northern Baja during the period. Given this
developing pattern, we can expect to see some synoptic cooling 
across our area fro the next couple of days along with a bit of 
cooler marine air spreading into the SJ Valley. Highs should end 
up a few degrees below climo today and Thursday. Increased
instability with the passing energy will allow for some Sierra
showers, mainly Thursday. Can't rule out a couple in the Yosemite
vicinity this afternoon, but moisture will be more available 
Thursday.


The closed low is forecast to drift southeast to near northern
Baja through the weekend and into early next week while high
pressure amplifies along the west coast. This will bring us
dry conditions with temperatures rewarming during the period.
Highs will return to a few degrees above normal by the start of
next week. Late Thursday into Friday will see increased offshore 
flow as surface high pressure builds onto the Great Basin and 
upper winds turn easterly around the developing low. 


&&

.AVIATION...
VFR conditions will prevail over the Central CA Interior for at 
least 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 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