Frost Advisory 5, NWS Los Angeles, CA

SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION...UPDATED AVN
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
1030 AM PDT SAT OCT 6 2007

UPDATED AVIATION SECTION

.SHORT TERM...FORECAST ON TRACK THIS MORNING. CLEAR SKIES REMAIN
OVER MOST OF THE AREA...EXCEPT FOR SOME CLOUDS AND LIGHT RAIN/SNOW
SHOWERS LINGERING OVER THE NORTHERN INTERIOR SLOPES OF THE
MOUNTAINS...BUT EVEN THOSE ARE RAPIDLY DISSIPATING. FRAZIER PARK DID
REPORT A LIGHT DUSTING OF SNOW THIS MORNING...AND WEBCAMS REVEAL
SOME SNOW COVERED HILLS OVER MOUNT PINOS. TEMPS WERE QUITE COOL THIS
MORNING...WITH MOST OF THE COASTAL AREAS NORTH OF LA COUNTY WELL
INTO THE 40S FOR LOWS...WITH SOME MOUNTAIN AREAS DIPPING INTO THE
20S.

WINDS WILL BE THE MAJOR STORY FOR TODAY AND TOMORROW. SBA COUNTY SAW
A HEALTHY SUNDOWNER LAST NIGHT. EXTENDED THE WIND ADVISORY A COUPLE
OF HOURS THERE AS WINDS HAVE NOT RELAXED VERY MUCH...WITH MONTECITO
GUSTING TO 58 MPH EVEN AT 9 AM. NORTH WINDS WILL CONTINUE TO PICK
UP OVER THE MOUNTAINS THROUGH THIS MORNING...BUT THE WINDS MIGHT
VERY WELL BE LOCALIZED TO MAKE IT A BORDERLINE ADVISORY CASE FOR
TODAY...BUT LATE TONIGHT INTO SUN MORNING STILL LOOKS PROMISING.
WHITAKER PEAK NEAR THE LA/VTU MOUNTAIN BORDER CURRENTLY HAS GUSTS AT
58 MPH...BUT ALL THE OTHER STATIONS REMAIN UNDER 35 MPH AT THIS
POINT...THOUGH MORE STATIONS SHOULD PICK UP SOON.

...FROM PREVIOUS DISCUSSION...

THE UPPER TROUGH OVER THE GREAT BASIN WILL SHIFT EWD TONIGHT AND
SUNDAY. ALTHOUGH WINDS ALF AND COLD AIR ADVECTION WILL WKN ACRS THE
AREA TONIGHT AND SUN...LOW LVL FLOW WILL TURN MORE NELY...AND
DECENT SUBSIDENCE WILL CONT ACROSS THE AREA. IN ADDITION...LOW LVL
OFFSHORE GRADS WILL BECOME FAIRLY STRONG...TO ABOUT 6 MB OFFSHORE
FROM KLAX TO KDAG. ONCE AGAIN...EXPECT ADVISORY LVL WINDS TO
REDEVELOP IN THE MTNS OF L.A. AND VTU COUNTIES LATER TONIGHT
INTO SUNDAY. EXPECT STRONG WINDS TO BE SOMEWHAT MORE WDSPRD IN
THE VLYS AND PORTIONS OF CSTL SXNS OF L.A./VTU COUNTIES SUNDAY
MORNING...AND WIND ADVISORIES MAY WELL BE NEEDED FOR THOSE AREAS.
TEMPS WILL JUMP SIGNIFICANTLY ON SUNDAY...WITH HIGHS IN MOST COASTAL
AND VLY AREAS IN THE 80S. HUMIDITIES WILL DROP SHARPLY LATER TODAY
IN THE MTNS AND VLYS...WITH LOW HUMIDITIES CONTG INTO SUNDAY NIGHT.
WITH THE GUSTY WINDS...THIS WILL CREATE POTENTIALLY DANGEROUS FIRE
CONDITIONS...AND FIRE WEATHER WATCHES ARE IN EFFECT FOR THE MTNS AND
VLYS OF L.A. AND VTU COUNTIES.

WITH CLEAR SKIES AND VERY DRY CONDITIONS OVERNIGHT LOWS WILL GET
QUITE COLD IN WIND PROTECTED AREAS AWAY FROM THE COAST TONIGHT AND
SUNDAY NIGHT. BELIEVE IT OR NOT...THERE COULD BE SOME LOCAL FROST
OR TEMPS BRIEFLY NEAR FREEZING ACROSS PORTIONS OF THE ANTELOPE VLY
OR THE INTERIOR VLYS OF SLO COUNTY AND THE CUYAMA VLY
TONIGHT...AND LESS LIKELY SUNDAY NIGHT.

A VERY WEAK UPPER TROUGH WILL APCH SRN CA FROM THE SW SUNDAY NIGHT
AND MONDAY. OFFSHORE GRADS MAY STILL BE STRONG ENOUGH TO CREATE SOME
LOCALLY GUSTY WINDS THROUGH AND BELOW PASSES AND CANYONS IN THE MTNS
AND VLYS OF L.A. AND VTU COUNTIES SUN NIGHT/MON MORNING...BUT SHOULD
REMAIN WELL BELOW ADVISORY LVLS. DO NOT XPCT ANY STRATUS TO DEVELOP
SUN NIGHT...SO SKIES SHOULD REMAIN CLEAR ACROSS THE AREA. A
RETURN TO ONSHORE FLOW MON SHOULD BRING SOME COOLING TO THE CSTL
PLAIN...BUT INLAND TEMPS WILL CHANGE LITTLE OR POSSIBLE EVEN INCH
UPWARD.

.LONG TERM...
A TROUGH WILL APCH THE PAC NW MON NIGHT/TUE. HGTS WILL FALL ACROSS
THE AREA ON TUE...SO XPCT A FEW DEGREES OF COOLING...ESPECIALLY W OF
THE MTNS AS ONSHORE GRADS INCREASE. STRATUS MAY MAKE A RETURN TO
IMDT CSTL SXNS MON NIGHT...BUT MORE LIKELY TUE NIGHT. THE SFC FRONT
ASSOCD WITH THE TROUGH COULD BRING RAIN TO NRN CA LATE TUE AND TUE
NIGHT...BUT WITH MOST OF THE ENERGY REMAINING WELL TO THE NORTH OF
THE AREA...XPCT JUST PTLY CLOUDY SKIES WITH THE SRN END OF THE FRONT
ACROSS NRN SXNS TUE NIGHT INTO WED. TEMPS SHOULD COOL A BIT MORE ON
WED...ESPECIALLY N OF PT CONCEPTION. THEN...IT LOOKS LIKE A RATHER
QUIET WEATHER PATTERN FOR THE REST OF THE WEEK...WITH BROAD SWLY
FLOW WITH HEIGHTS TYPICAL FOR OCTOBER ACROSS THE AREA. THIS SHOULD
PRODUCE SOME NIGHT/MORNING LOW CLDS AND FOG ON THE CSTL PLAIN...
WITH TEMPS MOSTLY NEAR NORMAL THU THRU FRI.

&&

.AVIATION...AT 1730Z...OR 1030 AM PDT...VITUALLY CERTAIN CLEAR SKIES
WILL PERSIST OVER KLAX AND KBUR THROUGH THE PERIOD AS NE AND E FLOW
PREVAILS. VERY LIKELY STRONGEST E AND NE FLOW WILL OCCUR BETWEEN
13-18Z SUN MORNING.

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

&&

PUBLIC...KITTELL/BRUNO
AVIATION...FORWOOD

WWW.WEATHER.GOV/LOSANGELES

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
1109 AM PDT SAT OCT 6 2007

CAZ034>041-044>047-051>054-059-087-088-071300-
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-
LOS ANGELES COUNTY VALLEYS-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-
1109 AM PDT SAT OCT 6 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY

AREAS OF GUSTY NORTHWEST TO NORTHEAST WINDS WILL AFFECT THE
MOUNTAINS AND VALLEYS OF LOS ANGELES AND VENTURA COUNTIES...AND
PORTIONS OF THE COASTAL PLAIN TODAY AND TONIGHT. RELATIVE HUMIDITIES
WILL FALL SHARPLY INTO THE TEENS TONIGHT OVER THE MOUNTAINS WHICH
WHEN COUPLED WITH THE WINDS WILL CREATE A HAZARDOUS POTENTIAL FOR
FIRE GROWTH. IT WILL BE A VERY COLD NIGHT TONIGHT IN THE ANTELOPE
VALLEY...ACROSS THE INTERIOR VALLEYS OF SAN LUIS OBISPO COUNTY AND
IN THE CUYAMA VALLEYS. LOCAL FROST IS LIKELY IN THESE AREAS...AND
TEMPERATURES MAY BRIEFLY DROP TO NEAR OR SLIGHTLY BELOW FREEZING
LATE TONIGHT.

* RED FLAG WARNING...........SEE WWUS86 KLOX - RFWLOX FOR DETAILS *

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

.DAYS TWO THROUGH SEVEN... SUNDAY THROUGH FRIDAY

AREAS OF STRONG NORTHEAST WINDS WILL AFFECT THE MOUNTAINS AND VALLEY
OF LOS ANGELES AND VENTURA COUNTIES...THE VENTURA COUNTY COASTAL
PLAIN...AND COASTAL SECTIONS OF LOS ANGELES COUNTIES BELOW PASSES
AND CANYONS FROM MALIBU TO HOLLYWOOD SUNDAY. WIND ADVISORIES WILL
LIKELY BE NEEDED FOR PORTIONS OF THE MOUNTAINS AND VALLEYS. THE
COMBINATION OF WARM...VERY DRY CONDITIONS...AND GUSTY WINDS WILL
CREATE HEIGHTENED FIRE DANGER SUNDAY AND THE RED FLAG WARNING WILL
CONTINUE LATE INTO THE EVENING ON SUNDAY.

* RED FLAG WARNING...........SEE WWUS86 KLOX - RFWLOX FOR DETAILS *

.SPOTTER INFORMATION STATEMENT...

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

KITTELL