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| Agua Dulce, California 91390
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| Hurricane Information |
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Full Advisory Text
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Warning Description: Flash Flood Watch
Warning Date: 7:23 PM PST on February 8, 2010
WarningSum:...Flash Flood Watch For The Recent Burn Areas In Effect From
Tuesday Afternoon Through Late Tuesday Night...
Warning Message:The National Weather Service in Los Angeles/Oxnard has issued a
* Flash Flood Watch for the recent burn areas in Los Angeles
County. This included the station...Morris and Santa Anita burn
areas.
* From Tuesday afternoon through late Tuesday night
* showers will develop by Tuesday afternoon...then continue
through late Tuesday night. Some of the showers will be heavy at
times...and there is a chance of thunderstorms. There is the
potential for rainfall rates between one half inch and one inch
per hour. These rates are in excess of thresholds determined by
the USGS to be sufficient to cause flash flooding and debris
flows in and below the recent burn areas.
Precautionary/preparedness actions...
A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.
You should monitor later forecasts and be prepared to take action
should flash flood warnings be issued.
Warning Description: Special Weather Statement
Warning Date: 2:41 PM PST on February 8, 2010
WarningSum:...A Very Cold And Vigorous Storm System Will Affect Southwestern
California Tuesday Through Early Wednesday...
Warning Message:A strong and very cold upper low off the Pacific northwest coast
this afternoon is forecast to drop southward along or just off the
California coast tonight and Tuesday...tracking right across
southwestern California Tuesday night. This system will threaten the
region with a variety of weather hazards...including possibly heavy
showers...thunderstorms...gusty winds and moderate to heavy snow
accumulations with very low snow levels.
Clouds will increase across the region tonight. Showers will
likely develop north of Point Conception early Tuesday morning..then
become likely in all areas Tuesday afternoon and evening. Showers
will begin to decrease from northwest to southeast across the region
late Tuesday night. Scattered showers will linger into
Wednesday...especially across north facing slopes of the Los Angeles
and Ventura County mountains and the Antelope Valley.
While moisture will initially be fairly limited with this system...
it may begin to tap into some deeper Pacific moisture as it moves
into southwestern California late Tuesday and Tuesday night. Very
cold air aloft associated with the approaching upper low will cause
increasing instability through the atmosphere Tuesday afternoon into
Tuesday night...leading to a chance of thunderstorms...some of which
could produce small hail...very heavy downpours and gusty winds.
It is not out of the question that some hail could approach severe
limits...and some waterspouts in the coastal waters could come
ashore as weak tornados.
Since the precipitation will be showery in nature...rainfall totals
Tuesday through early Wednesday will be highly variable...but will
average one half inch to one inch in coastal and valley areas...with
up to 1.50 inches in the foothills and mountains. Any areas that
receive thunderstorms may receive higher rainfall totals. It
appears that the highest rainfall totals will occur across Los
Angeles County...especially across eastern sections...including the
station and Morris burn areas. These areas will also have the best
chance of receiving thunderstorms with high intensity rainfall.
Residents in and below the recent burn areas should be prepared for
the potential for very heavy downpours. Flash flood watches may need
to be issued for the recent burn areas of Los Angeles County...
especially if the system takes a more over-water trajectory.
Due to the cold nature of this storm...snow will likely fall at very
low elevations across the region...impacting travel on many major
routes into and through the mountains. Snow levels are expected to
start out between 3500 and 4000 feet on Tuesday...then will lower
to between 2000 and 2500 feet Tuesday night. This would bring
accumulating snows into portions of the Antelope Valley and
Cuyama valleys...where up to 4 inches are possible...especially in
the foothills. An inch or two of snow may even fall over the
higher elevations of the Santa Monica Mountains and the interior
valleys of San Luis Obispo County. Snow may even occasionally fall
in the higher foothills above the Los Angeles and Ventura County
valleys...but no snow accumulations are expected there.
In the mountains of Los Angeles and Ventura counties...snow
accumulations of 6 to 12 inches are expected...with local totals as
high as 16 inches in the san Gabriels. In the mountains of San Luis
Obispo and Santa Barbara counties...3 to 6 inches of snow are
expected. Please refer to (laxwswlox) for more details.
Residents of southwest California are urged to stay tuned to the
latest National Weather Service statements and possible watches and
warnings as this weather situation continues to develop.
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