High Wind Watch 8, NWS Los Angeles, CA

SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
925 AM PDT TUE MAY 12 2009

.SHORT TERM (TONIGHT-THU)...MARINE LAYER THIS MORNING AT LAX WAS
NEAR 2700 FT DEEP...WITH LOW CLOUDS MAINLY S OF POINT CONCEPTION.
SOME RADIATION FOG WAS ALSO NOTED OVER A FEW INLAND VALLEYS OF
SLO/SBA COUNTIES THIS MORNING AS WELL...BUT HAVE LARGELY DISSIPATED
AT MID MORNING. WITH THE DEEPENING MARINE LAYER AND EDDY CIRCULATION
OVER THE SOCAL BIGHT...THERE WAS PATCHY DRIZZLE ACROSS THE COASTAL
PLAIN AND INTO SOME OF THE VALLEYS EARLY THIS MORNING OVER VTU/L.A.
COUNTIES. THE MARINE LAYER CLOUDS ARE EXPECTED TO CLEAR BACK TO THE
COAST BY AFTERNOON WITH MOSTLY SUNNY SKIES EXPECTED IN ALL AREAS.
THE BIG STORY TODAY ARE THE WINDS WHICH WERE ALREADY GUSTING OVER 40
MPH OVER PARTS OF THE ANTELOPE VALLEY AND L.A./VTU MTNS. A HIGH WIND
WARNING IS IN EFFECT FOR THE ANTELOPE VALLEY THIS AFTERNOON INTO
THIS EVENING...AND ALSO FOR THE L.A./VTU MTNS TODAY THRU 3 AM
WEDNESDAY. WITH GUSTY WINDS EXPECTED ON THE CENTRAL COAST TODAY...
WILL BE ISSUING A WIND ADVISORY FOR THIS AREA AS WINDS SHOULD GUST
TO AT LEAST 35 MPH AT TIMES MAINLY THIS AFTERNOON INTO EARLY THIS
EVENING.

THE NORTHWEST TO NORTH FLOW IS EXPECTED TO INCREASE OVER THE SBA S
COAST AND MOUNTAINS THIS EVENING AS WELL AS THE N-S PRESSURE
GRADIENT INCREASES...WITH WINDS POSSIBLY GUSTING TO 60 MPH BELOW AND
THROUGH THE PASSES AND CANYONS THIS EVENING THRU LATE TONIGHT. IT
LOOKS LIKE THE STRONGEST WINDS MAY BE MAINLY AROUND AND WEST OF SAN
MARCOS PASS INCLUDING GAVIOTA PASS. WILL ALSO BE ISSUING A HIGH WIND
WATCH FOR THIS AREA THIS MORNING VALID FOR THIS EVENING THRU LATE
TONIGHT...PLEASE SEE LAXNPWLOX FOR DETAILS ON THE STRONG AND
POTENTIALLY DAMAGING WINDS OVER PORTIONS OF THE FORECAST AREA.

...REMAINDER FROM PREVIOUS DISCUSSION...

MORE WINDS WEDNESDAY WITH ADVISORIES VERY LIKELY IN THE MOUNTAINS...
THE SANTA MONICAS...AND THE SANTA CLARITA VLY. WARNINGS MAY BE
NEEDED IN THE MTNS.

ANOTHER SUNDOWNER WEDNESDAY NIGHT...A LITTLE STRONGER BY ABOUT 5 MPH
THAN TONIGHT. THE BIGGER STORY WILL BE THROUGH THE I-5 CORRIDOR
WHERE IT LOOKS LIKE ANOTHER ROUND OF WARNING LEVEL WINDS.

THURSDAY WILL BE QUITE A BIT LIKE WEDNESDAY...EXCEPT THAT A GOOD
SHOT OF UPPER LEVEL SUPPORT IS FORECAST OVER THE SBA SOUTH COAST.
THE WRF HAS BEEN A LITTLE WONKY WITH WINDS LATELY AND DO NOT
COMPLETELY TRUST IT...BUT HAVE TO BE WARY OF POSSIBLE WARNING LEVEL
WINDS THU MORNING. OTHERWISE LITTLE IF ANYTHING CHANGES
SYNOPTICALLY. THE NORTH GRADIENTS INCREASE WHILE THE WEST GRADIENTS
SUBSIDE SO THE ANTELOPE VLY WINDS WILL SLACKEN SOME.

.LONG TERM (FRI-MON)...THE EC AND GFS AGREE THAT FRIDAY WILL BE
BREEZY BUT NOT AS MUCH AS WED AND THU. IT WILL ALSO BE THE LAST DAY
OF THE WINDS AS THE NW FLOW SUBSIDED IN RESPONSE TO BUILDING HIGH
PRESSURE COMING UP FROM THE SOUTHWEST.

THE WEEKEND LOOKS WARM...VERY WARM AS A LARGE HIGH PRESSURE SYSTEM
SETS UP OVER THE AREA. THERE IS ENOUGH NE FLOW TO ELIMINATE THE
MARINE LAYER AND CAUSE A NICE COMPRESSIONAL BUMP UP FOR THE COASTS
AND VLYS. THE BEST OFFSHORE FLOW IS SATURDAY WHICH MAY MEAN THE
COASTS WILL HAVE PEAK TEMPS SAT. BUT HGTS INCREASE FURTHER SUNDAY
WHICH WOULD MAKE THAT THE WARMEST DAY OF THE WEEK FOR THE INTERIOR.
THE EC AND GFS DISAGREE ON HOW WARM WITH THE EC FCST ABOUT 5 DEGREES
WARMER THAN THE ALREADY WARM GFS. TRENDED TOWARDS THE GFS SOLN BUT
WILL MONITOR.

MONDAY IS SORT OF A TOSS UP WITH THE GFS FORECASTING COOLING AND THE
EC SHOWING ONE MORE DAY OF HEAT. BUMPED TEMPS DOWN A COUPLE OF
DEGREES FROM SUNDAYS AND WILL REASSESS THE SITUATION IN 24 HOURS.

&&

.AVIATION...

12/1100Z

1800 FOOT MARINE LAYER HAS PUSHED CLOUDS ACROSS THE COASTS AND MOST
VLYS. GOOD ONSHORE PUSH WILL HINDER BURN OFF TODAY. KOXR MAY
STRUGGLE TO CLEAR TODAY BUT OTHER TAFS WILL CLEAR A FEW HOURS LATER
THAN NORMAL AROUND NOON ON THE COAST AND LATE MORNING IN THE VALLEYS.

KLAX...GOOD CONFIDENCE IN TAF THROUGH 04Z WITH THIS MORNINGS BURN
OFF LIKELY WITH IN AN HOUR OF NOON FCST TIME. LOWER CONFIDENCE IN
CLOUDS RETURNING TONIGHT WITH CLOUDS LIKELY ARRIVING LATE BUT COULD
SEE LOWER CIGS IN SLIGHTLY BEFORE MIDNIGHT.

KBUR...GOOD CONFIDENCE IN TAF. SOME LLWS SETTING UP LATER TONIGHT.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
HIGH WIND WARNING (SEE LAXNPWLOX).
HIGH WIND WATCH (SEE LAXNPWLOX).
RED FLAG WARNING (SEE LAXRFWLOX).
WIND ADVISORY (SEE LAXNPWLOX).
GALE WARNING (SEE LAXMWWLOX).
GALE WATCH (SEE LAXMWWLOX).

&&

PUBLIC...SIRARD/RORKE
AVIATION...BRUNO

WWW.WEATHER.GOV/LOSANGELES

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
600 AM PDT TUE MAY 12 2009

CAZ034>041-044>046-051>054-059-087-088-547-548-131300-
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-
600 AM PDT TUE MAY 12 2009

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY

VERY STRONG WINDS WILL CERATE HAZARDS IN THE MOUNTAINS AND DESERTS
TODAY. ADDITIONALLY THE WINDS WILL CREATE HAZARDOUS AREAS OF QUARTER
MILE VISIBILITIES IN BLOWING SAND AND DUST. LOCAL DENSE FOG WILL
CREATE DRIVING HAZARDS IN SOUTHERN SANTA BARBARA COUNTY. MARINERS
WILL FACE A HAZARDOUS GALE ACROSS ALL THE OUTER WATERS.

* HIGH WIND WARNING..........SEE WWUS76 KLOX - NPWLOX FOR DETAILS *

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

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

.DAYS TWO THROUGH SEVEN... WEDNESDAY THROUGH MONDAY

DANGEROUS WIND GUSTS TO 60 MILES PER HOUR WILL CONTINUE IN THE
MOUNTAINS WHILE ADVISORY LEVEL WIND GUSTS WILL BE LIKELY BELOW
PASSES AND CANYONS ACROSS THE COASTS AND VALLEYS. LOW HUMIDITIES
WILL COMBINE WITH THE WINDS TO PRODUCE A HAZARDOUS FIRE WEATHER
ENVIRONMENT. MARINERS WILL FACE A HAZARDOUS GALE ACROSS ALL THE
OUTER WATERS. A SIGNIFICANT HEAT WAVE WILL GRIP THE AREA OVER THE
WEEKEND.

* HIGH WIND WARNING..........SEE WWUS76 KLOX - NPWLOX FOR DETAILS *

* FIRE WEATHER WATCH.........SEE WWUS86 KLOX - RFWLOX FOR DETAILS *

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

.SPOTTER INFORMATION STATEMENT...

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

RORKE