HAZARDOUS WEATHER OUTLOOK
Issue Date: 600 AM PST MON DEC 21 2009
Expiration: 600 AM PST TUE DEC 22 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.
.DAY ONE... TODAY
AN ELEVATED RIP CURRENT RISK WILL POSE HAZARDS FOR BEACHGOERS TODAY.
* HIGH RIP CURRENT RISK......SEE FZUS56 KLOX - SRFLOX FOR DETAILS *
.DAYS TWO THROUGH SEVEN... TUESDAY THROUGH SUNDAY
STRONG WINDS WILL CREATE A MULTITUDE OF HAZARDS TUESDAY AND TUESDAY
NIGHT. WIND GUSTS TO 60 MPH WILL BE POSSIBLE IN THE MOUNTAINS AND
DESERTS AS WELL AS THE SANTA BARBARA SOUTH COAST...THE SANTA CLARITA
VALLEY AND THE SAN FERNANDO VALLEY. GALE FORCE WINDS WILL CREATE
HAZARDS FOR BOATERS IN BOTH THE INNER AND OUTER WATERS.
IN ADDITION TO THE WINDS THERE IS ALSO A SLIGHT CHANCE OF SHOWERS
ACROSS THE GRAPEVINE TUESDAY MORNING.
* HIGH WIND WATCH............SEE WWUS76 KLOX - NPWLOX FOR DETAILS *
* GALE WATCH...............SEE WHUS76 KLOX - MWWLOX FOR DETAILS *
* 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.
SPECIAL WEATHER STATEMENT
Issue Date: 411 AM PST MON DEC 21 2009
Expiration: 600 PM PST MON DEC 21 2009
...STRONG WINDS AND COOLER TEMPERATURES POSSIBLE FOR THE SOUTHLAND
TUESDAY INTO TUESDAY NIGHT...
A COLD AND VIGOROUS UPPER LEVEL LOW PRESSURE SYSTEM IS EXPECTED TO
DIG SOUTHWARD ACROSS INTERIOR CALIFORNIA AND NEVADA TUESDAY. DUE TO
THE EXPECTED INLAND TRACK...THIS SYSTEM WILL LIKELY HAVE LIMITED
MOISTURE. THE BEST THREAT OF MEASURABLE RAINFALL IS EXPECTED ACROSS
SAN LUIS OBISPO COUNTY THIS AFTERNOON AND EVENING...THEN ACROSS THE
NORTH SLOPES OF THE LOS ANGELES AND VENTURA COUNTY MOUNTAINS ON
TUESDAY. ANY RAINFALL AMOUNTS WITH THIS SYSTEM ARE EXPECTED TO BE
FAIRLY LIGHT...GENERALLY UNDER A TENTH OF AN INCH...WITH THE
EXCEPTION OF LOCAL AMOUNTS UP TO ONE QUARTER INCH ACROSS SAN LUIS
OBISPO COUNTY.
SNOW LEVELS ARE EXPECTED TO LOWER RAPIDLY ON TUESDAY...GENERALLY
FALLING TO BETWEEN 4000 AND 5000 FEET...WITH THE EXCEPTION OF THE
NORTH SLOPES WHICH COULD SEE SNOW DOWN TO AROUND 3000 FEET. BY
TUESDAY NIGHT...VERY COLD AIR IS EXPECTED TO SPREAD INTO THE
AREA...WITH SNOW LEVELS POTENTIALLY FALLING AS LOW AS 2000 FEET. AT
THIS POINT...ANY THREAT OF SNOW SHOWERS IS EXPECTED TO BE CONFINED
TO THE NORTH SLOPES NEAR THE KERN COUNTY LINE...BUT THE EXPECTED
COLD TEMPERATURES COULD BRING A THREAT OF BLACK ICE TO INTERIOR
PORTIONS OF THE FORECAST AREA. A FEW INCHES OF NEW SNOW WILL BE
POSSIBLE ACROSS THE NORTH FACING SLOPES...WITH ACCUMULATING SNOW
POSSIBLE ALONG INTERSTATE 5 NEAR THE GRAPEVINE.
IN ADDITION TO THE THREAT OF COLD TEMPERATURES AND LOW SNOW
LEVELS...THIS SYSTEM WILL BRING POWERFUL WINDS ACROSS SOUTHERN
CALIFORNIA. IN THE WAKE OF THE FRONT...STRONG AND WIDESPREAD
NORTHWEST WINDS ARE EXPECTED ACROSS THE REGION ON TUESDAY
AFTERNOON...WITH WINDS BECOMING MORE NORTHERLY BY TUESDAY EVENING.
THIS SYSTEM HAS STRONG UPPER LEVEL WIND SUPPORT...AND WILL BE COULD
PRODUCE DAMAGING WIND GUSTS OVER 70 MPH. THE MOST FAVORED LOCATIONS
WILL BE THE INTERSTATE 5 CORRIDOR AS WELL AS THE PASSES AND CANYONS
OF THE SANTA BARBARA COUNTY MOUNTAINS...INCLUDING THE SANTA YNEZ
RANGE. DUE TO THE EXPECTED NORTHERLY DIRECTION OF THIS WIND
EVENT...OTHER NORTH FACING LOCATIONS THAT WILL BE VULNERABLE TO
DAMAGING WIND GUSTS TO 60 MPH INCLUDE THE SANTA BARBARA SOUTH
COAST...SANTA CLARITA VALLEY...SAN FERNANDO VALLEY AND THE ANTELOPE
VALLEY. A HIGH WIND WATCH IS IN EFFECT FOR THESE AREAS. THE
REMAINING PORTIONS OF THE FORECAST AREA WILL LIKELY BE BLANKETED
WITH WIND ADVISORIES FOR GUSTS BETWEEN 35 AND 50 MPH.
THE INFLUX OF MUCH COLDER AIR INTO THE REGION TUESDAY NIGHT WILL
ALSO BRING THE RISK OF SUB-FREEZING TEMPERATURES TO WIND SHELTERED
PORTIONS OF SOUTHERN AND CENTRAL CALIFORNIA. RESIDENTS OF SOUTHERN
CALIFORNIA ARE URGED TO STAY TUNED TO THE LATEST NATIONAL WEATHER
SERVICE FORECASTS FOR THIS DEVELOPING WEATHER SITUATION.
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