High Wind Watch 7, NWS Los Angeles, CA

SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
955 PM PST SAT DEC 7 2013

UPDATED AVIATION SECTION

.SYNOPSIS...
ANOTHER ROUND OF COLD TEMPERATURES TONIGHT WITH LOCALLY GUSTY WINDS
IN THE WAKE OF A PASSING COLD FRONT. HIGH PRESSURE WILL BUILD INTO
THE GREAT BASIN SUNDAY NIGHT AND MONDAY...RESULTING IN OFFSHORE
WINDS AND COOL TEMPERATURES. OFFSHORE FLOW WILL CONTINUE INTO MIDWEEK
WITH A GRADUAL WARMING TREND.

&&

.SHORT TERM (TONIGHT-TUE)...THE MAIN WEATHER STORY CONTINUES TO BE THE
VERY COLD TEMPERATURES ACROSS SOUTHWEST CALIFORNIA THAT WILL CONTINUE
FOR THE NEXT FEW NIGHTS. ANOTHER SHOT OF COLD AIR HAS MOVED INTO THE
AREA IN THE WAKE OF A PASSING COLD FRONT EARLIER TODAY. THE GUSTY WINDS
THAT IMPACTED MUCH OF THE FORECAST AREA THIS AFTERNOON HAVE BEGUN TO
DIMINISH IN MOST AREAS. HOWEVER...GUSTY NORTHWEST TO NORTH WINDS
WILL AFFECT TYPICAL NORTH-SOUTH ORIENTED PASSES AND CANYONS. WIND
ADVISORIES REMAIN IN EFFECT FOR THE MOUNTAINS AND SANTA BARBARA
SOUTH COAST...WHERE GUSTS OF 40 TO 50 MPH CAN BE EXPECTED TONIGHT.

AS THE AIR MASS BEGINS TO DRY OUT TONIGHT...LOOKING FOR ANOTHER ROUND
OF COLD TEMPERATURES. FROST ADVISORIES LOOK GOOD FOR TONIGHT ACROSS
WIND SHELTERED VALLEYS AND COASTAL AREAS FROM THE CENTRAL COAST
SOUTHWARD TO VENTURA COASTAL PLAIN. TEMPERATURES WILL FALL INTO THE
20S ACROSS THE ANTELOPE VALLEY...SLO COUNTY INTERIOR VALLEYS...AND
CUYAMA VALLEY...HOWEVER THESE AREAS HAVE ALREADY SEEN 2 OR MORE
HARD FREEZE NIGHTS THIS SEASON (WHICH IS REASON THAT FREEZE WARNINGS
ARE NO LONGER BEING ISSUED FOR THESE AREAS).

A WEAK UPPER LEVEL DISTURBANCE IS EXPECTED TO SLIDE DOWN THE COAST
ON SUNDAY...BRINGING INCREASING MID AND HIGH LEVEL CLOUDS ACROSS
THE REGION. AT THIS POINT...ANY PRECIPITATION WITH THIS SYSTEM IS
EXPECTED TO STAY OFF THE COAST...BUT DID INCREASE CLOUD COVERAGE
FOR SUNDAY IN EVENING UPDATE. VERY COOL TEMPERATURES WILL CONTINUE
ACROSS THE REGION ON SUNDAY...WITH MOST COASTAL AND VALLEY AREAS
REMAINING IN THE 50S.

STRONG SURFACE HIGH PRESSURE WILL BUILD INTO THE GREAT BASIN BY
LATE SUNDAY NIGHT AND MONDAY. THIS WILL GENERATE MODERATE OFFSHORE
WINDS WITH SIGNIFICANT DRYING ACROSS SOUTHERN CALIFORNIA...WITH
GUSTY OFFSHORE WINDS LIKELY CONTINUING INTO TUESDAY. INITIALLY...THIS
WILL BE A COLD OFFSHORE WIND EVENT. IN FACT...THE INFLUX OF THIS
MUCH DRIER AIR WILL SET THE STAGE FOR EVEN COLDER TEMPERATURES
SUNDAY NIGHT AND AGAIN MONDAY NIGHT ACROSS MANY WIND SHELTERED
LOCATIONS. AS A RESULT...A FREEZE WATCH WILL LIKELY NEED TO BE
CONSIDERED ACROSS THE CENTRAL COAST...SANTA YNEZ VALLEY...AND
SANTA BARBARA SOUTH COAST FOR BOTH NIGHTS AS THERE WILL BE THE
POTENTIAL FOR A HARD FREEZE (WITH TEMPERATURES INTO THE 20S)
ACROSS WIND SHELTERED AREAS. EXTREMELY COLD OVERNIGHT LOWS CAN ALSO
BE EXPECTED ACROSS THE ANTELOPE VALLEY...CUYAMA VALLEY...AND
INTERIOR VALLEYS OF SLO COUNTY WHERE LOWS COULD APPROACH RECORD
LEVELS INTO THE TEENS.

*** FROM PREVIOUS DISCUSSION ***

DAYTIME TEMPERATURES WILL UNDERGO A VERY GRADUAL WARMING TREND
THROUGH THE SHORT TERM...BUT WILL REMAIN BELOW NORMAL. BY TUESDAY
EXPECT COAST AND VALLEY HIGHS IN THE LOWER TO MID 60S...WITH UPPER
40S TO 50S ACROSS THE INTERIOR.

.LONG TERM (WED-SAT)...
THE MEDIUM RANGE MODELS CONTINUE TO SHOW AN UPPER RIDGE AMPLIFYING
OVER THE WEST COAST ON WEDNESDAY..SHIFTING EASTWARD OVER THE GREAT
BASIN ON THURSDAY AS AN UPPER TROUGH APPROACHES THE COAST. THE
MODELS DIFFER ON THE DETAILS...BUT GENERALLY SHOW THE TROUGH
AMPLIFYING ALONG THE COAST WITH A CUTOFF LOW FORMING SOUTHWEST OF PT
CONCEPTION BY THU NIGHT. THE MODELS KEEP ANY RAIN ASSOCIATED WITH
THE LOW OVER THE OFFSHORE WATERS WEST OF THE AREA. A SHORT WAVE
RIDGE IS THEN FORECAST TO CROSS THE PACIFIC NORTHWEST AHEAD OF
ANOTHER UPPER TROUGH THAT WILL APPROACH THE WEST COAST EARLY
SATURDAY...WITH RAIN CHANCES LIMITED TO NORTHERN CALIFORNIA AND
NORTHWARD. SO THE EXTENDED LOOKS TO REMAIN DRY WITH BELOW NORMAL
TEMPERATURES...WITH HIGH CLOUDS INCREASING LATE IN THE PERIOD.

&&

.AVIATION...08/0550Z...EXPECT GENERALLY VFR CONDS THROUGH THE PD.
THERE COULD BE SOME MVFR/IFR CIGS IN THE MTNS AND ACROSS THE
INTERIOR VLYS OF SLO COUNTY BETWEEN 06Z AND 16Z. GUSTY NW TO N WNDS
IN THE MTNS...THRU AND BELOW PASSES AND CANYONS ON THE S COAST OF
SBA COUNTY AND LOCALLY IN THE VLYS OF L.A. COUNTY AND SANTA MONICA
MTNS WILL ABATE OVERNIGHT.

KLAX...HIGH CONFIDENCE IN 06Z TAF WITH VFR CONDITIONS THRU THE PD.
THERE IS A 20 PERCENT CHANCE THAT NLY CROSS WINDS WILL GUST TO 20 KT
BETWEEN 09Z AND 15Z.

KBUR...HIGH CONFIDENCE IN 06Z TAF WITH VFR CONDITIONS THRU THE PD. B

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY (SEE LAXNPWLOX).
FROST ADVISORY (SEE LAXNPWLOX).
GALE WARNING (SEE LAXMWWLOX).
HIGH SURF ADVISORY (SEE LAXCFWLOX).
HIGH RIP CURRENT RISK (SEE LAXSRFLOX).

&&

PUBLIC...GOMBERG/SMITH
AVIATION...DB
SYNOPSIS...GOMBERG

WWW.WEATHER.GOV/LOSANGELES

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
950 PM PST SAT DEC 7 2013

CAZ034>041-044>046-051>054-059-087-088-547-548-081400-
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-
950 PM PST SAT DEC 7 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.

WFO LOX PLANS TO DISCONTINUE THIS PRODUCT IN 2014.
PLEASE DIRECT ANY COMMENTS TO ERIC BOLDT AT 805-988-6623.

.DAY ONE... THROUGH TONIGHT

GUSTY WEST TO NORTHWEST WINDS WILL CONTINUE THROUGH LATE TONIGHT IN
THE MOUNTAINS AND ACROSS THE SOUTH COAST OF SANTA BARBARA COUNTY
BELOW PASSES AND CANYONS. TEMPERATURES ARE EXPECTED TO DROP TO
FREEZING OR SLIGHTLY BELOW FREEZING TONIGHT ACROSS A GOOD PORTION OF
THE REGION. THERE WILL BE A HIGH RIP CURRENT RISK ON ALL AREAS
BEACHES TONIGHT. GALE FORCE WINDS ARE EXPECTED ACROSS PORTIONS OF
THE OUTER COASTAL WATERS TONIGHT.

* WIND ADVISORY..............SEE WWUS76 KLOX - NPWLOX FOR DETAILS *

* FROST ADVISORY.............SEE WWUS76 KLOX - NPWLOX FOR DETAILS *

* GALE WARNING...............SEE WHUS76 KLOX - MWWLOX FOR DETAILS *

* HIGH RIP CURRENT RISK......SEE FZUS56 KLOX - SRFLOX FOR DETAILS *

.DAYS TWO THROUGH SEVEN... SUNDAY THROUGH FRIDAY

TEMPERATURES ARE EXPECTED TO BE NEAR FREEZING OR SLIGHTLY BELOW
FREEZING EARLY SUNDAY MORNING ACROSS A GOOD PORTION OF THE
REGION...WITH FROSTS OR HARD FREEZES DURING THE LATE NIGHT THROUGH
MORNING HOURS EACH DAY THROUGH AT LEAST TUESDAY AND POSSIBLY
WEDNESDAY. GUSTY NORTHEAST WINDS ARE EXPECTED ACROSS THE MOUNTAINS
AND VALLEYS OF LOS ANGELES AND VENTURA COUNTIES AND THE VENTURA
COUNTY COASTAL PLAIN VERY LATE SUNDAY NIGHT THROUGH TUESDAY
AFTERNOON.

* FREEZE WATCH...............SEE WWUS76 KLOX - NPWLOX FOR DETAILS *

* FROST ADVISORY.............SEE WWUS76 KLOX - NPWLOX FOR DETAILS *

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

SIRARD