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One product issued by NWS for: Mount Baldy
Special Weather Statement
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE OXNARD CA
315 PM PDT MON APR 19 2010
CAZ034>041-044>046-051>054-059-087-088-547-548-210100-
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-
315 PM PDT MON APR 19 2010
...ANOTHER LATE SEASON STORM SYSTEM EXPECTED TO AFFECT SOUTHWEST
CALIFORNIA TUESDAY THROUGH EARLY THURSDAY...
A COLD UPPER LEVEL LOW PRESSURE SYSTEM DROPPING THROUGH THE EASTERN
PACIFIC IS FORECAST TO APPROACH THE COAST OF CENTRAL CALIFORNIA
TUESDAY. ITS FRONTAL SYSTEM WILL LIKELY BRING RAIN TO SAN LUIS
OBISPO AND SANTA BABARA COUNTIES TUESDAY...WITH A GOOD CHANCE OF AT
LEAST SOME RAIN ACROSS VENTURA AND LOS ANGELES COUNTIES IN THE
AFTERNOON.
BEHIND THE FRONT...RAIN WILL TURN TO SHOWERS ON THE CENTRAL COAST
TUESDAY AFTERNOON AND ELSEWHERE TUESDAY EVENING. GUSTY WEST WINDS
WILL DEVELOP IN MANY COASTAL AREAS AND IN THE MOUNTAINS...AS WELL AS
THE ANTELOPE VALLEY.
COMPUTER MODELS SHOW THE UPPER LOW MOVING INTO CENTRAL CALIFORNIA
TUESDAY NIGHT...THEN SHOW IT WOBBLING AROUND THROUGH THURSDAY...WITH
BANDS OF MOISTURE PUSHING INTO SOUTHWESTERN CALIFORNIA. WHILE IT
CERTAINLY WILL NOT RAIN THE ENTIRE TIME...THERE WILL BE A CHANCE OF
SHOWERS AT TIMES ACROSS THE AREA TUESDAY NIGHT THROUGH EARLY
THURSDAY.
VERY COLD AIR ALOFT WILL OVERSPREAD THE REGION TUESDAY NIGHT AND
LINGER INTO WEDNESDAY. THIS WILL DESTABILIZE THE ATMOSPHERE...
LEADING TO A SLIGHT CHANCE OF THUNDERSTORMS. SOME OF THE
THUNDERSTORMS COULD PRODUCE SMALL HAIL AND BRIEF HEAVY DOWNPOURS.
SNOW LEVELS WILL LOWER DRAMATICALLY TUESDAY NIGHT...LIKELY DOWN TO
AROUND 3500 FEET...WITH LOW SNOW LEVELS CONTINUING ON WEDNESDAY.
SNOW COULD AFFECT TRAVEL ON PORTIONS OF INTERSTATE 5 THROUGH THE
GRAPEVINE...AND COULD EVEN AFFECT THE FOOTHILLS ABOVE THE ANTELOPE
AND CUYAMA VALLEYS...AND THE INTERIOR VALLEYS OF SAN LUIS OBISPO
COUNTY LATE TUESDAY NIGHT INTO WEDNESDAY.
WHILE THE MAIN FRONT WILL LIKELY BRING STEADY LIGHT PRECIPITATION TO
MOST OF THE REGION ON TUESDAY...THE SHOWERY NATURE OF THE
PRECIPITATION FROM TUESDAY NIGHT THROUGH EARLY THURSDAY WILL LEAD TO
HIGHLY VARIABLE STORM TOTALS. PRELIMINARY RAINFALL ESTIMATES ACROSS
SAN LUIS OBISPO AND SANTA BARBARA COUNTIES ARE EXPECTED TO RANGE
BETWEEN ONE THIRD AND THREE QUARTERS OF AN INCH (0.33 TO 0.75) IN
COASTAL AND VALLEY AREAS...AND ONE HALF INCH TO ONE INCH (0.50 TO
1.00) IN THE FOOTHILLS AND MOUNTAINS...WITH LOCAL TOTALS OVER AN
INCH POSSIBLE. ACROSS LOS ANGELES AND VENTURA COUNTIES...RAINFALL IS
EXPECTED TO AVERAGE ONE TENTH TO ONE THIRD OF AN INCH (0.10 TO 0.33)
IN COASTAL AND VALLEY AREAS...AND ONE THIRD TO THREE QUARTERS OF AN
INCH (0.33 TO 0.75) IN THE FOOTHILLS AND MOUNTAINS...WITH TOTALS
OVER AN INCH NOT OUT OF THE QUESTION. SEVERAL INCHES OF SNOW ARE
POSSIBLE IN THE MOUNTAINS...AND MAY REQUIRE THE ISSUANCE OF A WINTER
WEATHER ADVISORY AS WE DRAW CLOSER TO THE EVENT.
THERE IS STILL CONSIDERABLE UNCERTAINTY IN THE EXACT TRACK OF THE
UPPER LEVEL LOW PRESSURE SYSTEM. RAINFALL TOTALS WILL BE HIGHLY
SENSITIVE TO EVEN A SMALL DEVIATION OF THE CURRENT EXPECTED TRACK.
IF THE SYSTEM TRACKS FARTHER SOUTH AND WEST...RAINFALL AMOUNTS WILL
BE GREATER...WHILE A FARTHER INLAND TRACK WILL RESULT IN MUCH LESS
RAIN.
STAY TUNED TO NOAA WEATHER RADIO OR YOUR FAVORITE LOCAL MEDIA FOR
UPDATES ON THIS DEVELOPING WEATHER SITUATION.
$$
GOMBERG/BRUNO
U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail:
w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007
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