SPECIAL WEATHER STATEMENT
Issue Date: 1009 AM PST FRI NOV 27 2009
Expiration: 900 PM PST FRI NOV 27 2009
...COLD PACIFIC STORM WILL BRING A THREAT OF SHOWERS AND MOUNTAIN
SNOW TONIGHT INTO SATURDAY...
A COLD UPPER LEVEL LOW PRESSURE SYSTEM MOVING INTO NORTHERN
CALIFORNIA TODAY IS EXPECTED TO TRACK SOUTHWARD INTO SOUTHERN
CALIFORNIA TONIGHT INTO SATURDAY. THERE IS STILL SOME UNCERTAINTY OF
THE EXACT TRACK OF THIS COLD UPPER LEVEL LOW PRESSURE SYSTEM...WHICH
WILL HAVE A SIGNIFICANT IMPACT ON RAINFALL PROBABILITY AND ASSOCIATED
RAINFALL AMOUNTS ACROSS OUR REGION.
AT THIS TIME...IT APPEARS THAT THE SYSTEM WILL TAKE A MORE OVER-LAND
TRAJECTORY WHICH WOULD LIMIT THE AVAILABLE MOISTURE. HOWEVER...THIS
IS A COLD AND DYNAMIC SYSTEM...BRINGING THE THREAT OF BRIEF HEAVY
SHOWERS AS WELL AS A SLIGHT CHANCE OF THUNDERSTORMS WITH SMALL HAIL.
THE THREAT OF SHOWERS IS EXPECTED TO BEGIN ACROSS SAN LUIS OBISPO
AND SANTA BARBARA COUNTIES LATE THIS AFTERNOON OR
EVENING...SPREADING DOWN THE COAST INTO VENTURA AND LOS ANGELES
COUNTIES OVERNIGHT. DUE TO THE SHOWERY NATURE OF THE
PRECIPITATION...RAINFALL AMOUNTS WILL BE QUITE VARIABLE. MOST AREAS
ARE EXPECTED TO RECEIVE LESS THAN A QUARTER OF AN INCH OF
RAINFALL...BUT LOCALLY HIGHER AMOUNTS WILL BE POSSIBLE
NEAR HEAVIER SHOWERS AND THUNDERSTORMS. IF THIS SYSTEM ENDS UP MOVING
FURTHER WEST AND PICKS UP A MORE OVER-WATER TRAJECTORY...PROJECTED
RAINFALL AMOUNTS WOULD NEED TO BE INCREASED.
THIS WILL BE A COLD STORM SYSTEM...WITH SNOW LEVELS FALLING TO AROUND
4000 FEET LATER TONIGHT INTO SATURDAY...WITH SNOW LOCALLY FALLING
TO AROUND 3500 FEET IN HEAVIER SHOWERS AND ACROSS NORTH FACING
SLOPES. PLEASE REFER TO THE LATEST WINTER WEATHER ADVISORY PRODUCT
FOR MORE DETAILS ON EXPECTED WINTER WEATHER CONDITIONS.
BEHIND THIS SYSTEM...THERE WILL BE A RETURN OF GUSTY NORTHEAST WINDS
ACROSS SOUTHERN CALIFORNIA SUNDAY INTO MONDAY. INITIALLY...THE AIR
MASS IS EXPECTED TO REMAIN RATHER MOIST SUNDAY MORNING...BUT A DRYING
TREND IS EXPECTED LATER SUNDAY INTO MONDAY. WHILE THERE WILL BE
HEIGHTENED FIRE WEATHER CONCERNS WITH THIS OFFSHORE EVENT...IT IS
STILL UNCLEAR IF WEATHER AND FUEL CONDITIONS WILL REACH CRITICAL RED
FLAG THRESHOLDS.
HAZARDOUS WEATHER OUTLOOK
Issue Date: 600 AM PST FRI NOV 27 2009
Expiration: 600 AM PST SAT NOV 28 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.
.DAY ONE... TODAY AND TONIGHT
A LARGE NW SWELL WILL CONTINUE TO CREATE HIGH SURF ALONG THE CENTRAL
COAST BEACHES THIS MORNING. THIS SWELL WILL SPREAD TO BEACHES SOUTH
OF POINT CONCEPTION LATER THIS MORNING. SURF WILL RANGE FROM 7 TO 10
FEET WITH LOCAL SETS TO 12 FEET POSSIBLE. THERE WILL BE A HIGH
THREAT FOR RIP CURRENTS THROUGH THE PERIOD.
A COLD STORM WITH THE POTENTIAL FOR MOUNTAIN SNOW WILL ARRIVE
TONIGHT. THE SYSTEM WEAKENING COLD FRONT WILL ARRIVE THIS
AFTERNOON...BRINGING A CHANCE FOR RAIN NORTH OF POINT CONCEPTION.
THE FRONT WILL MOVES SOUTH THROUGHOUT THIS AFTERNOON AND
EVENING...POSSIBLY SPREADING ISOLATED TO SCATTERED LIGHT SHOWERS
INTO LOS ANGELES AND VENTURA COUNTIES. THE SYSTEMS COLD AND UNSTABLE
AIR WILL ARRIVE LATE TONIGHT...CONTINUING A THREAT OF SHOWERS FOR
THE COASTAL AND VALLEY AREA. DUE TO THE SYSTEMS INTERIOR TRACK...THE
HIGHEST CHANCE OF PRECIPITATION WILL OCCUR OVER INTERIOR SAN LUIS
OBISPO AND SANTA BARBARA COUNTIES...AND THE NORTHERN SLOPES OF THE
MOUNTAINS. A POTENTIAL EXISTS FOR THE SEASONS FIRST ACCUMULATING
SNOWFALL ALONG THE INTERSTATE 5 CORRIDOR. SNOW LEVELS WILL LIKELY
LOWER TO NEAR 4000 FEET LATE TONIGHT...LOCALLY LOWERING TO 3500
FEET IN HEAVIER SHOWERS. MOTORISTS PLANNING TRAVEL BETWEEN THE LOS
ANGELES METRO AREAS AND THE SAN JOAQUIN ARE ADVISED TO PREPARE
ACCORDINGLY FOR WINTER DRIVING CONDITIONS.
* WINTER WEATHER ADVISORY....SEE WWUS46 KLOX - WSWLOX FOR DETAILS *
* HIGH SURF ADVISORY.........SEE WHUS46 KLOX - CFWLOX FOR DETAILS *
* HIGH RIP CURRENT RISK......SEE FZUS56 KLOX - SRFLOX FOR DETAILS *
.DAYS TWO THROUGH SEVEN... SATURDAY THROUGH THURSDAY
A LARGE NW SWELL WILL CONTINUE TO CREATE HIGH SURF AT BEACHES SOUTH
OF POINT CONCEPTION THROUGH SUNDAY MORNING. SURF WILL RANGE FROM 6
TO 9 FEET WITH LOCAL SETS TO 10 FEET POSSIBLE.
OTHERWISE...THE POTENTIAL FOR MOUNTAIN SNOW WILL CONTINUE THROUGH
SATURDAY. SNOW LEVELS WILL LIKELY HOVER NEAR 4000 FEET...LOCALLY
LOWERING TO 3500 FEET IN HEAVIER SHOWERS. MOTORISTS PLANNING TRAVEL
BETWEEN THE LOS ANGELES METRO AREAS AND THE SAN JOAQUIN ARE ADVISED
TO PREPARE ACCORDINGLY FOR WINTER DRIVING CONDITIONS.
AN OFFSHORE FLOW PATTERN DEVELOPING BEHIND THE SYSTEM WILL DEVELOP
GUSTY NORTHEAST WINDS ACROSS SOUTHERN CALIFORNIA SATURDAY NIGHT
THROUGH MONDAY. INITIALLY...THE AIR MASS IS EXPECTED TO REMAIN
RATHER MOIST SUNDAY MORNING...BUT A DRYING TREND IS EXPECTED LATER
SUNDAY INTO MONDAY. WHILE THERE WILL BE HEIGHTENED FIRE WEATHER
CONCERNS WITH THIS OFFSHORE EVENT...IT IS STILL UNCLEAR IF WEATHER
AND FUEL CONDITIONS WILL REACH CRITICAL RED FLAG THRESHOLDS.
* WINTER WEATHER ADVISORY....SEE WWUS46 KLOX - WSWLOX FOR DETAILS *
* HIGH SURF ADVISORY.........SEE WHUS46 KLOX - CFWLOX FOR DETAILS *
.SPOTTER INFORMATION STATEMENT...
WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
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