Thursday, February 24, 2011

[californiadisasters] Special Weather Statement for Southern California



http://www.wrh.noaa.gov/total_forecast/getprod.php?wfo=lox&sid=LOX&pil=SPS




WWUS86 KLOX 240301
SPSLOX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
701 PM PST WED FEB 23 2011

CAZ034>041-044>046-051>054-059-087-088-547-548-250200-
SAN LUIS OBISPO COUNTY CENTRAL COAST-
SANTA BARBARA COUNTY CENTRAL COAST-SANTA YNEZ VALLEY-
SAN LUIS OBISPO COUNTY INTERIOR VALLEYS-CUYAMA VALLEY-
SANTA BARBARA COUNTY SOUTH COAST-VENTURA COUNTY COAST-
LOS ANGELES COUNTY COAST INCLUDING DOWNTOWN LOS ANGELES-
VENTURA COUNTY INTERIOR VALLEYS-VENTURA COUNTY COASTAL VALLEYS-
SANTA MONICA MOUNTAINS RECREATIONAL AREA-
SAN LUIS OBISPO COUNTY MOUNTAINS-SANTA BARBARA COUNTY MOUNTAINS-
VENTURA COUNTY MOUNTAINS-
LOS ANGELES COUNTY MOUNTAINS EXCLUDING THE SANTA MONICA RANGE-
ANTELOPE VALLEY-CATALINA ISLAND-SANTA CLARITA VALLEY-
LOS ANGELES COUNTY SAN FERNANDO VALLEY-
LOS ANGELES COUNTY SAN GABRIEL VALLEY-
701 PM PST WED FEB 23 2011

...A VERY COLD STORM SYSTEM WILL IMPACT SOUTHWEST CALIFORNIA FRIDAY
INTO SATURDAY...

A VERY COLD LOW PRESSURE SYSTEM ORIGINATING FROM CANADA WILL MOVE
SOUTHWARD ALONG THE WEST COAST ON THURSDAY...THEN IMPACTING SOUTHWEST
CALIFORNIA FRIDAY INTO SATURDAY.

THE INITIAL COLD FRONT WILL BRING ABOUT 3 TO 5 HOURS OF MODERATE TO
HEAVY RAIN AND MOUNTAIN SNOW TO SAN LUIS OBISPO AND SANTA BARBARA
COUNTIES ON FRIDAY...SPREADING INTO VENTURA AND LOS ANGELES COUNTIES
LATE FRIDAY AFTERNOON INTO FRIDAY NIGHT. BEHIND THE COLD FRONT...
A VERY COLD AND UNSTABLE AIR MASS WILL CONTINUE TO BRING A THREAT
OF SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS INTO SATURDAY. SOME
OF THESE POST-FRONTAL STORMS COULD BRING BRIEF HEAVY DOWNPOURS...
HAIL...GUSTY WINDS...AND WATERSPOUTS. PRELIMINARY RAINFALL AMOUNTS
ARE GENERALLY EXPECTED TO RANGE FROM ONE HALF TO ONE INCH ACROSS THE
COASTAL AND VALLEY AREAS...WITH ONE TO TWO INCHES POSSIBLE IN
THE FOOTHILLS AND LOWER MOUNTAIN ELEVATIONS.

THE MAIN IMPACTS OF THIS UPCOMING STORM SYSTEM WILL BE THE POTENTIAL
FOR SIGNIFICANT SNOWFALL ACCUMULATION AND STRONG WINDS IN THE
MOUNTAINS...AS WELL AS THE POTENTIAL FOR VERY LOW SNOW LEVELS BEHIND
THE FRONT. THE MAJORITY OF THE SNOWFALL IN THE MOUNTAINS IS EXPECTED
TO BE ASSOCIATED WITH THE COLD FRONT...WHEN SNOW LEVELS ARE GENERALLY
EXPECTED TO BE AROUND 4000 FEET. BEHIND THE COLD FRONT...SNOW LEVELS
WILL FALL RAPIDLY...AS LOW AS 500 FEET NORTH OF POINT
CONCEPTION...AND 1000 FEET SOUTH OF POINT CONCEPTION. PRELIMINARY
SNOW ESTIMATES WITH THIS UPCOMING STORM SYSTEM ARE 1 TO 2 FEET
ACROSS THE MOUNTAINS ABOVE 4000 FEET...WITH LESSER ACCUMULATIONS
BELOW 4000 FEET. LATE FRIDAY NIGHT INTO SATURDAY...LIGHTER SNOW
ACCUMULATIONS WILL BE POSSIBLE ACROSS THE ANTELOPE VALLEY
FLOOR...SANTA MONICA MOUNTAINS...AND SANTA CLARITA VALLEY. IN
ADDITION...MANY FOOTHILL AND HIGHER VALLEY LOCATIONS WILL BE
AT RISK FOR LIGHT SNOWFALL...ESPECIALLY THOSE COMMUNITIES NEAR
THE MOUNTAINS.

IN ADDITION...STRONG SOUTHWEST WINDS GUSTING OVER 50 MPH WILL BE
POSSIBLE WITH THE FRONT...POTENTIALLY CREATING BRIEF WHITEOUT
CONDITIONS. AS WE DRAW CLOSER TO THE EVENT...A WINTER STORM WATCH
WILL LIKELY BE POSTED FOR ALL OF THE MOUNTAINS AND POSSIBLY THE
ANTELOPE VALLEY...WHILE OTHER LOWER ELEVATION LOCATIONS MAY REQUIRE
WINTER WEATHER ADVISORIES.

SNOW AND ICY CONDITIONS WILL LIKELY IMPACT MANY OF OUR MAJOR MOUNTAIN
ROADWAYS...INCLUDING INTERSTATE 5 FROM THE GRAPEVINE TO SANTA
CLARITA...AS WELL AS HIGHWAY 14 FROM SANTA CLARITA VALLEY TO THE
ANTELOPE VALLEY...INCLUDING THE SOLEDAD CANYON. DUE TO THE UNUSUALLY
LOW SNOW LEVELS EXPECTED...SOME OF THE LOWER ELEVATION ROADWAYS THAT
ARE ESPECIALLY AT RISK FOR SNOW INCLUDE HIGHWAY 101 (ESPECIALLY
NEAR CUESTA PASS)...HIGHWAY 154...HIGHWAYS 41 AND 46 IN SAN LUIS
OBISPO COUNTY...AS WELL AS HIGHWAYS 126 AND 118 IN VENTURA COUNTY.

THIS STORM HAS THE POTENTIAL TO BRING SOME OF THE LOWEST SNOW LEVELS
WE HAVE SEEN IN RECENT TIMES. WITH SUCH LOW SNOW LEVELS
POSSIBLE...THIS UPCOMING STORM SYSTEM COULD BE DEADLY FOR UNPREPARED
MOTORISTS...CAMPERS OR HIKERS. ANYONE PLANNING TO TRAVEL INTO THE
MOUNTAINS ON FRIDAY AND SATURDAY SHOULD BE PREPARED FOR WINTER STORM
CONDITIONS WITH VERY COLD TEMPERATURES. REMEMBER TO ALWAYS CARRY AN
EMERGENCY KIT IN YOUR CAR IN CASE YOU ENCOUNTER HAZARDOUS DRIVING
CONDITIONS. STAY TUNED FOR THE LATEST NATIONAL WEATHER SERVICE
FORECASTS AND STATEMENTS AS THIS UNUSUALLY COLD WINTER STORM
APPROACHES THE SOUTHLAND.

$$

GOMBERG


__._,_.___


Be sure to check out our Links Section at http://groups.yahoo.com/group/californiadisasters/links
Please join our Discussion Group at http://groups.yahoo.com/group/californiadisasters_discussion/ for topical but extended discussions started here or for less topical but nonetheless relevant messages.




Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe

__,_._,___

No comments:

Post a Comment