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California, San Luis Obispo County Interior Valleys

Special Statement

Statement as of 5:26 PM PDT on October 31, 2014

Expires 9:00 PM EDT on October 31, 2014


... Pacific storm system to bring periods of Rain... Mountain
snow... possible thunderstorms and gusty winds to southwest
California tonight into Saturday...

A cold front will spread rain along the central coast this
evening... with rain over Ventura and Los Angeles counties later
tonight. Showers will persist into Saturday morning across the
region... with a chance of residual showers on north facing
mountain slopes through Saturday evening. Most areas will see 3
to 4 hours of steady rain with the initial front... followed by
light showers as the front moves east. There will also be a
slight chance of thunderstorms over San Luis Obispo and Santa
Barbara counties late tonight as colder air moves in aloft. Any
thunderstorms will have the potential to produce brief heavy rain
showers and small hail.

Rainfall totals are generally expected to range from three
quarters of an inch to one and one half inches along the central
coast... with higher amounts across northwest San Luis Obispo
County. Otherwise rainfall amounts of one quarter to three
quarters of an inch can be expected for most areas... with local
amounts up to one inch in the San Gabriel Mountains.

Snow levels will fall to near 6000 feet late tonight into
Saturday morning. Most of the steady precipitation should be over
before the snow levels lower significantly. 1 to 3 inches of snow
will be possible for the San Gabriel Mountains around 7000 feet
and above... with an inch or less between 6000 and 7000 feet. The
expected snowfall combined with gusty winds could produce
dangerous mountain driving conditions tonight.

Southwest winds gusting to 35 to 40 mph are expected over the
mountains of Ventura and Los Angeles counties and the Antelope
Valley this evening. Winds will turn northwest over the area by
Saturday morning with gusts up to 40 mph in the mountains and
Antelope Valley.

Residents near the Colby burn area should monitor the latest
National Weather Service forecasts and statements as the potential
for locally heavy downpours tonight could bring the threat of minor
mud and debris flows.

Since this will be the first widespread rain event in quite some
time... roads will be extra slick due to months of oil buildup on
paved surfaces. Motorists are urged to use extra caution in the
rain. In addition... people traveling into the mountains should be
prepared for winter weather driving conditions.

Listen to NOAA Weather Radio or your local media for the latest
updates on this storm system.


Rat/asr/cms


450 am PDT Fri Oct 31 2014

... Pacific storm system to affect southwestern California this
afternoon through Saturday...

A cold upper level trough of low pressure and surface cold front
will bring periods of Rain... Mountain snow... possible
thunderstorms... and gusty winds to southwestern California this
afternoon through Saturday.

A fast moving cold front will spread rain along the central coast
this afternoon... then spread into Ventura and Los Angeles counties
this evening. Showers will persist into Saturday morning across the
region... with a chance of residual showers mainly on north facing
mountain slopes from Saturday afternoon through early Sunday
morning. Most areas are expected to see 3 to 4 hours of steady rain
with the initial front... then turn showery as the front moves east.
There will also be a slight chance of thunderstorms over San Luis
Obispo and Santa Barbara counties tonight as colder air moves in
aloft. Any thunderstorms would have the potential to bring brief
heavy rain and small hail.

Rainfall amounts from this afternoon through Saturday are generally
expected to range between three quarters of an inch to one and one
half inches along the central coast... with higher amounts across
northwestern San Luis Obispo County. Otherwise rainfall amounts of
one quarter to three quarters of an inch can be expected for most
areas... with local amounts up to one inch in the San Gabriel
Mountains.

Snow levels will start out above 7500 feet through this afternoon
then fall to 6000 to 6500 feet by Saturday morning. Most of the
steady precipitation should be over before the snow levels lower
significantly. Even so... 1 to 3 inches of snow accumulation will be
possible for the San Gabriel Mountains around 7000 feet and
above... with an inch or less between 6000 and 7000 feet. With the
expected snowfall combined with gusty winds... driving conditions in
the mountains could be difficult tonight.

Southwest winds gusting to around 40 mph are also expected over
the mountains of Ventura and Los Angeles counties and in the
Antelope Valley this afternoon and tonight in advance of the front.
Winds will turn northwest over the area by Saturday morning with
gusts around 40 mph possible in the mountains and Antelope Valley.

Residents near the Colby burn area should monitor the latest
National Weather Service forecasts and statements as the potential
for locally heavy downpours tonight could bring the threat of minor
mud and debris flows.

Since this will be the first widespread rain event in quite some
time... roads will be extra slick due to months of oil buildup on
paved surfaces. Motorists are urged to use extra caution in the
rain. In addition... people planning to travel into the mountains
should be prepared for winter weather driving conditions over the
higher elevations.

Listen to NOAA Weather Radio or your local media for the latest
updates on this storm system.



Weather Severe Map
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Virginia - Winter Storm Warning , Winter Weather Advisory
Washington - Record Report
West Virginia - Winter Weather Advisory
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Wyoming - Air Quality Alert , Record Report
- Gale Warning
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