Land Management Forecasts
Issued by NWS Los Angeles, CA

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ECCDA Discussions
National Weather Service Los Angeles/Oxnard CA
357 PM PST Sun Feb 18 2018

ECC029-191800-
Los Padres National Forest-
Discussion for Vandenberg ECC Dispatch
357 PM PST Sun Feb 18 2018

...Discussion from Los Angeles/Oxnard...

...MUCH COLDER CONDITIONS WITH GUSTY NORTHERLY WINDS AND RAIN AND
MOUNTAIN SNOW SHOWERS TONIGHT THROUGH MONDAY NIGHT FOR MUCH OF
SOUTHWEST CALIFORNIA...

Onshore winds will continue to strengthen this afternoon and evening
ahead of a deepening low pressure system dropping southward across
California. This along with a moderate eddy will likely support
fairly rapid marine layer development and deepening this afternoon
into tonight. This low pressure system has limited moisture due to
its mostly over-land trajectory, but scattered showers will develop
across the region tonight into Monday, especially for north facing
mountain slopes, eastern Los Angeles county, and all areas north of
Point Conception. This system will likely bring the coldest air mass
of the season along with windy conditions. Snow levels will lower
rapidly overnight, falling as low as 1500 feet on Monday. The cold
temperatures with strong winds will produce dangerous wind chill
readings on Monday across the mountains. Most of the snow
accumulation will be on north facing mountain slopes where 2 to
4 inches could accumulate. Even Interstate 5 near the Grapevine
could see 1 to 2 inches of snow along with icy road conditions.
Brief snow showers will also be possible across foothill and valley
areas above 1500 feet on Monday. Widespread frost and freeze
conditions are expected Monday night and again Tuesday night as this
very cold air mass settles over the region.


...Discussion from Monterey...

...Scattered showers tonight and Monday morning with very low  snow
levels...  ...Widespread freezing temperatures expected inland late
Monday  night and early Tuesday...

A cold weather system will produce scattered showers tonight and
Monday morning, mainly along the coast and in the coastal hills.
Snow levels will drop to 1500 feet tonight and as low as 1000 feet
or lower on Monday. Snow could occur locally as low as 500 feet.
Greatest potential for snow accumulation is  above 1500 feet in the
Santa Cruz Mountains and Santa Lucia  Mountains. In addition,
locally strong and gusty northwest winds  will persist through
Monday, especially near the coast where gusts to 40 mph are likely.
Very cold temperatures are forecast for  Monday night once skies
clear and winds subside. Widespread  freezing temperatures are
forecast for inland areas late Monday  night and Tuesday morning and
frost may occur all the way to the  coast. A cool and unsettle
weather pattern is forecast to persist through the week and into
next weekend.

Note : All winds are 20-foot Winds Unless otherwise specified.
Thunderstorms imply strong, gusty and erratic winds.



$$

ECC028-191800-
Santa Barbara County excluding Los Padres National Forest-
Discussion for Santa Barbara ECC Dispatch
357 PM PST Sun Feb 18 2018

...MUCH COLDER CONDITIONS WITH GUSTY NORTHERLY WINDS AND RAIN AND
MOUNTAIN SNOW SHOWERS TONIGHT THROUGH MONDAY NIGHT FOR MUCH OF
SOUTHWEST CALIFORNIA...

Onshore winds will continue to strengthen this afternoon and evening
ahead of a deepening low pressure system dropping southward across
California. This along with a moderate eddy will likely support
fairly rapid marine layer development and deepening this afternoon
into tonight. This low pressure system has limited moisture due to
its mostly over-land trajectory, but scattered showers will develop
across the region tonight into Monday, especially for north facing
mountain slopes, eastern Los Angeles county, and all areas north of
Point Conception. This system will likely bring the coldest air mass
of the season along with windy conditions. Snow levels will lower
rapidly overnight, falling as low as 1500 feet on Monday. The cold
temperatures with strong winds will produce dangerous wind chill
readings on Monday across the mountains. Most of the snow
accumulation will be on north facing mountain slopes where 2 to
4 inches could accumulate. Even Interstate 5 near the Grapevine
could see 1 to 2 inches of snow along with icy road conditions.
Brief snow showers will also be possible across foothill and valley
areas above 1500 feet on Monday. Widespread frost and freeze
conditions are expected Monday night and again Tuesday night as this
very cold air mass settles over the region.


$$

ECC031-191800-
Angeles National Forest-
Discussion for Lancaster ECC Dispatch
357 PM PST Sun Feb 18 2018

...MUCH COLDER CONDITIONS WITH GUSTY NORTHERLY WINDS AND RAIN AND
MOUNTAIN SNOW SHOWERS TONIGHT THROUGH MONDAY NIGHT FOR MUCH OF
SOUTHWEST CALIFORNIA...

Onshore winds will continue to strengthen this afternoon and evening
ahead of a deepening low pressure system dropping southward across
California. This along with a moderate eddy will likely support
fairly rapid marine layer development and deepening this afternoon
into tonight. This low pressure system has limited moisture due to
its mostly over-land trajectory, but scattered showers will develop
across the region tonight into Monday, especially for north facing
mountain slopes, eastern Los Angeles county, and all areas north of
Point Conception. This system will likely bring the coldest air mass
of the season along with windy conditions. Snow levels will lower
rapidly overnight, falling as low as 1500 feet on Monday. The cold
temperatures with strong winds will produce dangerous wind chill
readings on Monday across the mountains. Most of the snow
accumulation will be on north facing mountain slopes where 2 to
4 inches could accumulate. Even Interstate 5 near the Grapevine
could see 1 to 2 inches of snow along with icy road conditions.
Brief snow showers will also be possible across foothill and valley
areas above 1500 feet on Monday. Widespread frost and freeze
conditions are expected Monday night and again Tuesday night as this
very cold air mass settles over the region.


$$

ECC024-191800-
San Luis Obispo County-
Discussion for San Luis Obispo ECC Dispatch
357 PM PST Sun Feb 18 2018

...MUCH COLDER CONDITIONS WITH GUSTY NORTHERLY WINDS AND RAIN AND
MOUNTAIN SNOW SHOWERS TONIGHT THROUGH MONDAY NIGHT FOR MUCH OF
SOUTHWEST CALIFORNIA...

Onshore winds will continue to strengthen this afternoon and evening
ahead of a deepening low pressure system dropping southward across
California. This along with a moderate eddy will likely support
fairly rapid marine layer development and deepening this afternoon
into tonight. This low pressure system has limited moisture due to
its mostly over-land trajectory, but scattered showers will develop
across the region tonight into Monday, especially for north facing
mountain slopes, eastern Los Angeles county, and all areas north of
Point Conception. This system will likely bring the coldest air mass
of the season along with windy conditions. Snow levels will lower
rapidly overnight, falling as low as 1500 feet on Monday. The cold
temperatures with strong winds will produce dangerous wind chill
readings on Monday across the mountains. Most of the snow
accumulation will be on north facing mountain slopes where 2 to
4 inches could accumulate. Even Interstate 5 near the Grapevine
could see 1 to 2 inches of snow along with icy road conditions.
Brief snow showers will also be possible across foothill and valley
areas above 1500 feet on Monday. Widespread frost and freeze
conditions are expected Monday night and again Tuesday night as this
very cold air mass settles over the region.


$$

ECC032-191800-
Ventura County excluding Los Padres National Forest-
Discussion for Ventura ECC Dispatch
357 PM PST Sun Feb 18 2018

...MUCH COLDER CONDITIONS WITH GUSTY NORTHERLY WINDS AND RAIN AND
MOUNTAIN SNOW SHOWERS TONIGHT THROUGH MONDAY NIGHT FOR MUCH OF
SOUTHWEST CALIFORNIA...

Onshore winds will continue to strengthen this afternoon and evening
ahead of a deepening low pressure system dropping southward across
California. This along with a moderate eddy will likely support
fairly rapid marine layer development and deepening this afternoon
into tonight. This low pressure system has limited moisture due to
its mostly over-land trajectory, but scattered showers will develop
across the region tonight into Monday, especially for north facing
mountain slopes, eastern Los Angeles county, and all areas north of
Point Conception. This system will likely bring the coldest air mass
of the season along with windy conditions. Snow levels will lower
rapidly overnight, falling as low as 1500 feet on Monday. The cold
temperatures with strong winds will produce dangerous wind chill
readings on Monday across the mountains. Most of the snow
accumulation will be on north facing mountain slopes where 2 to
4 inches could accumulate. Even Interstate 5 near the Grapevine
could see 1 to 2 inches of snow along with icy road conditions.
Brief snow showers will also be possible across foothill and valley
areas above 1500 feet on Monday. Widespread frost and freeze
conditions are expected Monday night and again Tuesday night as this
very cold air mass settles over the region.


$$

ECC030-191800-
Los Angeles County excluding Angeles National Forest-
Discussion for Los Angeles ECC Dispatch
357 PM PST Sun Feb 18 2018

...MUCH COLDER CONDITIONS WITH GUSTY NORTHERLY WINDS AND RAIN AND
MOUNTAIN SNOW SHOWERS TONIGHT THROUGH MONDAY NIGHT FOR MUCH OF
SOUTHWEST CALIFORNIA...

Onshore winds will continue to strengthen this afternoon and evening
ahead of a deepening low pressure system dropping southward across
California. This along with a moderate eddy will likely support
fairly rapid marine layer development and deepening this afternoon
into tonight. This low pressure system has limited moisture due to
its mostly over-land trajectory, but scattered showers will develop
across the region tonight into Monday, especially for north facing
mountain slopes, eastern Los Angeles county, and all areas north of
Point Conception. This system will likely bring the coldest air mass
of the season along with windy conditions. Snow levels will lower
rapidly overnight, falling as low as 1500 feet on Monday. The cold
temperatures with strong winds will produce dangerous wind chill
readings on Monday across the mountains. Most of the snow
accumulation will be on north facing mountain slopes where 2 to
4 inches could accumulate. Even Interstate 5 near the Grapevine
could see 1 to 2 inches of snow along with icy road conditions.
Brief snow showers will also be possible across foothill and valley
areas above 1500 feet on Monday. Widespread frost and freeze
conditions are expected Monday night and again Tuesday night as this
very cold air mass settles over the region.


$$



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