SPECIAL WEATHER STATEMENT
Issue Date: 543 AM PST FRI DEC 11 2009
Expiration: 600 PM PST FRI DEC 11 2009
...PERIODS OF RAIN WILL AFFECT CENTRAL AND SOUTHERN CALIFORNIA
THROUGH SUNDAY...
AN UPPER LEVEL TROUGH IN THE EASTERN PACIFIC WILL MOVE INTO THE WEST
COAST LATER TODAY AND TONIGHT. ANOTHER STRONGER UPPER LOW WILL PUSH
INTO THE WEST COAST SATURDAY NIGHT. VARIOUS IMPULSES ASSOCIATED WITH
THESE SYSTEMS WILL BRING PERIODS OF RAIN TO CENTRAL AND SOUTHERN
CALIFORNIA THROUGH SUNDAY.
RAIN WILL DECREASE ACROSS VENTURA AND LOS ANGELES COUNTIES EARLY
THIS MORNING. IN THE MOUNTAINS ABOVE 6000 FEET...A WINTER WEATHER
ADVISORY IS IN EFFECT FOR LINGERING SNOWFALL THROUGH MID MORNING.
A CLUSTER OF HEAVY SHOWERS AND POSSIBLE THUNDERSTORMS WILL LIKELY
MOVE INTO SAN LUIS OBISPO AND SANTA BARBARA COUNTIES EARLY THIS
MORNING. THERE IS A CHANCE THESE SHOWERS COULD HOLD TOGETHER
TO AFFECT VENTURA AND LOS ANGELES COUNTIES BY LATE MORNING.
THERE WILL BE A THREAT OF RAIN AT ANY TIME ACROSS SOUTHWESTERN
CALIFORNIA THROUGH SUNDAY. IT CURRENTLY APPEARS THAT THERE WILL BE
TWO DISTINCT PERIODS DURING WHICH THE THREAT OF STEADY AND POSSIBLY
HEAVY RAIN WILL BE GREATEST. THE FIRST WILL BE LATE THIS AFTERNOON
INTO TONIGHT ACROSS SAN LUIS OBISPO AND SANTA BARBARA COUNTIES...AND
TONIGHT INTO EARLY SATURDAY MORNING ACROSS VENTURA AND LOS ANGELES
COUNTIES.
ACROSS SAN LUIS OBISPO AND SANTA BARBARA COUNTIES...RAINFALL AMOUNTS
THROUGH EARLY SATURDAY ARE GENERALLY EXPECTED TO RANGE FROM ONE HALF
INCH TO AN INCH AND A QUARTER...WITH LOCALLY HIGHER AMOUNTS IN
FAVORED UPSLOPE LOCATIONS. ACROSS VENTURA AND LOS ANGELES
COUNTIES...RAINFALL IS EXPECTED TO AVERAGE ONE THIRD OF AN INCH TO
THREE QUARTERS OF AN INCH...WITH LOCAL TOTALS OVER AN INCH IN THE
FOOTHILLS...ESPECIALLY IN EASTERN LOS ANGELES COUNTY. RAINFALL RATES
COULD EXCEED ONE QUARTER INCH PER HOUR TONIGHT.
THERE MAY BE SOMEWHAT OF A BREAK IN THE RAIN LATE SATURDAY MORNING
INTO SATURDAY AFTERNOON...THEN ANOTHER PERIOD OF RAIN...THIS ONE
LIKELY HEAVIER...WILL AFFECT THE ENTIRE REGION LATE SATURDAY
AFTERNOON OR EVENING INTO SUNDAY MORNING.
RAIN MAY BECOME HEAVY AT TIMES...ESPECIALLY SATURDAY NIGHT...WITH
RAINFALL RATES POSSIBLY ABOVE ONE HALF INCH PER HOUR. WITH THIS
SECOND SYSTEM...THERE IS GREATER CONCERN ABOUT POTENTIAL MUD AND
DEBRIS FLOWS IN AND AROUND THE RECENT BURN AREAS...AND FLASH FLOOD
WATCHES MAY BE NEEDED.
ADDITIONAL RAINFALL TOTALS WITH THE NEXT BATCH OF RAIN LATE SATURDAY
THROUGH EARLY SUNDAY ARE EXPECTED TO AVERAGE THREE QUARTERS OF AN
INCH TO AN INCH AND A HALF IN COASTAL AND VALLEY AREAS...WITH ONE
AND A HALF INCHES TO THREE INCHES IN THE FOOTHILLS AND MOUNTAINS
BELOW THE SNOW LEVEL. SNOW LEVELS SHOULD GENERALLY BE BETWEEN 6000
AND 7000 FEET THROUGH SATURDAY NIGHT...THEN WILL LOWER BY SUNDAY
MORNING.
THERE IS A POTENTIAL FOR SIGNIFICANT SNOW ACCUMULATIONS IN THE
MOUNTAINS ABOVE 6500 FEET THROUGH SUNDAY...WITH THE HEAVIEST
SNOW EXPECTED SATURDAY NIGHT. IN ADDITION...WINDS WILL BECOME RATHER
STRONG IN THE MOUNTAINS LATE SATURDAY AND SATURDAY NIGHT...WITH
GUSTS OVER 50 MPH POSSIBLE. WINTER STORM WATCHES MAY HAVE TO
BE ISSUED FOR THE MOUNTAINS LATER TODAY.
WITH THE COMPLEX AND RAPIDLY DEVELOPING WEATHER PATTERN OVER THE
NEXT FEW DAYS ACROSS CENTRAL AND SOUTHERN CALIFORNIA...RESIDENTS
ARE URGED TO STAY TUNED TO NOAA WEATHER RADIO OR THEIR FAVORITE
LOCAL NEWS SOURCE FOR THE LATEST INFORMATION ABOUT THIS WEATHER.
HAZARDOUS WEATHER OUTLOOK
Issue Date: 600 AM PST FRI DEC 11 2009
Expiration: 600 AM PST SAT DEC 12 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.
.DAY ONE... TODAY
SCATTERED SHOWERS TODAY WILL CREATE SLICK ROADWAYS AND HAZARDS FOR
MOTORISTS. SNOW WILL FALL ABOVE 6000 FEET CREATING HAZARDS FOR
MOTORISTS AND PERSONS WORKING OUTSIDE. THERE IS A SLIGHT CHANCE OF A
THUNDERSTORM THIS MORNING ACROSS THE CENTRAL COAST. HEAVIER RAIN
WITH SNOW ABOVE 6000 FEET WILL ARRIVE THIS EVENING. THIS RAIN WILL
BRING HAZARDS TO MOTORISTS AND COULD PRODUCE SMALL DEBRIS FLOWS OVER
THE DEBRIS AREAS.
* WINTER WEATHER ADVISORY....SEE WWUS46 KLOX - WSWLOX FOR DETAILS *
* HIGH RIP CURRENT RISK......SEE FZUS56 KLOX - SRFLOX FOR DETAILS *
* MARINE WEATHER STATEMENT...SEE FZUS76 KLOX - MWSLOX FOR DETAILS *
* SPECIAL WEATHER STATEMENT..SEE WWUS86 KLOX - SPSLOX FOR DETAILS *
.DAYS TWO THROUGH SEVEN... SATURDAY THROUGH THURSDAY
A STRONGER STORM WILL ARRIVE LATE SATURDAY AFTERNOON AND WILL LAST
THROUGH SUNDAY MORNING. THIS STORM WILL BRING THE POTENTIAL FOR
HEAVY RAIN AND SNOW AND WILL BE CAPABLE OF CREATING LARGE DEBRIS
FLOWS IN AND AROUND THE BURN AREAS.
* SPECIAL WEATHER STATEMENT..SEE WWUS86 KLOX - SPSLOX FOR DETAILS *
.SPOTTER INFORMATION STATEMENT...
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
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