High Wind in California, November 6, 2020

Area Forecast Discussion
National Weather Service Hanford CA
435 PM PST Fri Nov 6 2020

...Update to Air Quality Issues Section...

.SYNOPSIS...
A cold front will sweep through Central California today, bringing
with it gusty winds and a much cooler air mass. Rain and mountain
snow are expected this weekend. High temperatures this weekend
will be well below normal for this time of year. Dry weather will
return to Central California next week. Cool and dry conditions
expected for much of next week.

&&

.DISCUSSION...
A cold front is moving south across central CA this afternoon.
Temperatures much cooler then 24 hours ago. Strong gusty winds
behind the front have resulted in some blowing dust across the San
Joaquin Valley. Radar starting to detect some precipitation along
the front towards the Yosemite area.

Models prog an upper trough over N CA moving south over central CA
on Saturday and onshore trough S CA Saturday night. Precipitation
should spread from north to south through the forecast area
tonight. Convective showers will be probable Saturday morning
especially towards the coastal mountains as upper level energy
moves down the coast. Convective showers will be possible through
Saturday afternoon especially over the mountains with a cool
unstable airmass over central CA. Another trough will quickly
follow late Saturday night and Sunday. This system may be colder
and contain more moisture. The trough will also move north to
south but more inland towards the sierra range. Thus models
indicate heavier rain amounts with the second weather system
Saturday night to Sunday evening. Not much of a break in between
systems so treating these systems as a single storm system. Winter
storm warming have been posted for heavy snow potential over the
sierra and winter weather advisory for Tehachapi Mountains for
several inches of snow and snow level lowering down to pass level
Saturday night and Sunday.

The low pressure system will move to the southeast over the
Desert Southwest Sunday night. A drier air mass will move into the
CA for much of next week. The San Joaquin Valley may be more prone
to the formation of Tule Fog each night next week. In addition,
frost could occur in the coldest locations in the San Joaquin
Valley Monday night and Tuesday night.

Little change with the expected rain amounts. One tenth of an
inch to one quarter of an inch of rain will be possible in the
San Joaquin Valley and West Side Hills this weekend. One quarter
of an inch to one half of an inch of precipitation is anticipated
in the Sierra Nevada foothills and Kern County mountains this
weekend. Less than one tenth of an inch of rain is expected in the
Kern County desert this weekend. Hazardous winter driving
conditions and travel delays are expected in the Sierra Nevada
this weekend. Wintry precipitation may fall on Tejon Pass and on
Tehachapi Pass Sunday and Sunday evening. This would impact
travel on Interstate 5 through the Grapevine and Highway 58. Plan
accordingly.

&&

.AVIATION...
Mountains obscurations over the sirra and Tehachapi Mountains with
rain and snow showers.

&&

.AIR QUALITY ISSUES...
Please see SFOAQAHNX for an Air Quality Alert

On Saturday November 7 2020... Fireplace/Wood Stove Burning Status
is: No Burning Unless Registered in Fresno... Kern... Kings...
Madera 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.html for additional information
an/or to provide feedback.

&&

.HNX WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory from 8 PM this evening to 10 PM PST
Sunday for CAZ195>197.

Winter Storm Warning from 8 PM this evening to 10 PM PST Sunday
for CAZ193-194.

Winter Storm Warning until 10 PM PST Sunday for CAZ192.

Wind Advisory until 5 PM PST this afternoon for CAZ179>188.

&&

public...MV
aviation....Durfee

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