Frost Advisory 7, NWS Los Angeles, CA

SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
230 PM PST SUN DEC 4 2005

.SHORT TERM...HAVE ISSUED A FREEZE WARNING FOR SANTA YNEZ VALLEY AND
FROST ADVISORY FOR THE SLO COUNTY COAST AS WELL AS THE NORTH SANTA
BARBARA COAST TONIGHT. A WIND ADVISORY WAS REISSUED AS WELL FOR
AREAS OF VENTURA AND LOS ANGELES COUNTIES. HIGH PRESSURE OVER THE
GREAT BASIN WILL SHIFT SOUTH AND EAST OVERNIGHT AND EXPECT WIND WILL
REMAIN BELOW WARNING THRESHOLDS. DEW POINTS ALONG THE COAST NORTH OF
POINT CONCEPTION WERE IN THE UPPER 20S THIS MORNING AND REMAIN IN
THE UPPER 20S TO MID 30S AT THIS TIME...TEMPERATURES WILL FALL INTO
THE MID TO LOWER 30S BY MIDNIGHT AND WIDESPREAD FROST WILL DEVELOP
BY EARLY MORNING. TEMPERATURES WERE IN THE UPPER 20S IN THE SANTA
YNEZ VALLEY THIS MORNING AND DRIER CONDITIONS WILL BAR WIDESPREAD
FROST AND HAVE ISSUED A FREEZE WARNING FOR SEVERAL HOURS OF
TEMPERATURES IN THE UPPER 20S. GUIDANCE INITIALIZED A WEAK UPPER
LEVEL SHORT WAVE CROSSING 139W AND MOVING THROUGH THE LONG WAVE
UPPER RIDGE CENTERED ALONG 137W EARLY THIS AFTERNOON REASONABLY
WELL. UPPER LEVEL CLOUD FIELD UPSTREAM WILL MOVE OVER THE AREA
OVERNIGHT AND MON AS THE SHORT WAVE MOVES THROUGH THE RIDGE
OVERNIGHT AND MOVES ASHORE MON. CURRENT TEMPERTURES WERE SEVERAL
DEGREES WARMER THAN 24 HOURS AGO OVER THE ENTIRE AREA AND WARMING
RATE WILL BE LESS MON WITH 2 TO 3 DEGREES WARMING EACH DAY THROUGH
TUE. CLOUDS WILL INCREASE WED AS GUIDANCE CONTINUES TO INDICATE AN
UPPER LOW MOVING SOUTH ALONG THE COAST NORTH OF THE AREA.

.LONG TERM...WILL CONTINUE WITH LOW POPS OVER THE ENTIRE AREA THU
THROUGH FRI. STABLE SOLITON TYPE UPPER PATTERN SETTLES OVER THE
COAST WITH ANTICYCLONE CENTER OVER SOUTHEAST OREGON AND UPPER
CYCLONE CENTERED OFFSHORE SOUTH OF THE AREA. PATTERN WILL DEVELOP
THU AND EVOLVE THROUGH SUN WITH THE UPPER CYCLONE SLOWLY SHIFTING
EAST AND MOVING ASHORE SOUTH OF THE AREA SUN. TEMPERATURES WILL WARM
TO NEAR NORMAL SAT AND SUN UNDER CLEARING SKIES AS THE UPPER SYSTEM
SHIFTS EAST OF THE AREA.

&&

.FIRE WEATHER...RED FLAG WARNING WILL CONTINUE THROUGH TUESDAY FOR
THE VALLEYS AND MOUNTAINS OF LOS ANGELES AND VENTURA COUNTIES EXCEPT
THE ANTELOPE VALLEY AS GUSTY CANYON WINDS COMBINED WITH LOW
HUMIDITIES WILL CONTINUE. HUMIDITY VALUES THIS AFTERNOON IN THESE
AREAS RANGED FROM ABOUT 10 TO 20 PERCENT IN THE VALLEYS...AND 7 TO
30 PERCENT IN THE MOUNTAINS. HOWEVER...HUMIDITIES ARE EXPECTED TO
LOWER EVEN FURTHER THROUGH MONDAY WITH WIDESPREAD MINIMUM HUMIDITIES
OF 10 PERCENT OR LESS EXPECTED MONDAY AND TUESDAY...ESPECIALLY IN
THE HIGHER VALLEYS...FOOTHILLS AND MOUNTAINS.

&&

.AVIATION...CLEAR SKIES WITH VFR CONDITIONS WILL CONTINUE OVERNIGHT.
CURRENT LAX-DAG SFC PRESSURE CONTINUES TO SHOW THE GRADIENT AT -5.4.
OFFSHORE FLOW WILL CONTINUE OVERNIGHT WITH WINDS INCREASING ONCE
AGAIN OVER THE FAVORING NE LOCATIONS FOR LOS ANGELES AND VENTURA
COUNTIES OVERNIGHT. THIS WILL INCLUDE THE MOUNTAINS AND VALLEYS AND
SOME OF THE COASTAL PLAIN LOCATIONS. POSSIBLE MODERATE WINDSHEAR
OVER KBUR OVERNIGHT AND EARLY MONDAY. NO STRATUS ISSUES FOR CWA.
KLAX WILL REMAIN SW 10 KT THROUGH EARLY EVENING...BECOMING VARIABLE
THROUGH 8Z...WITH WEAK NE FLOW LESS THAN 6 KT THROUGH THE EARLY
MORNING HOURS...THEN TURNING W EARLY AFTERNOON HOURS.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
WIND ADVISORY (SEE LAXNPWLOX).
SMALL CRAFT ADVISORY (SEE LAXCWFLOX).
FROST ADVISORY (SEE LAXNPWLOX).
FREEZE WARNING (SEE LAXNPWLOX).
RED FLAG WARNING (LAXRFWLOX).

&&

PUBLIC...FORWOOD
AVIATION...KAPLAN
FIRE...SIRARD

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
239 PM PST SUN DEC 4 2005

CAZ034>041-044>047-051>054-059-087-088-051400-
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-
239 PM PST SUN DEC 4 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWESTERN CALIFORNIA.

.DAY ONE... TODAY

HIGH PRESSURE OVER THE GREAT BASIN WILL PERSIST OVERNIGHT AND BRISK
NORTH AND NORTHEAST WIND WILL RESUME OVER THE VALLEYS AND MOUNTAINS
OF VENTURA AND LOS ANGELES COUNTIES. DRY COLD AIR THAT SETTLED OVER
THE COASTAL AREAS OF SANTA BARBARA AND SAN LUIS OBISPO COUNTIES AS
WELL AS THE SANTA YNEZ VALLEY SATURDAY NIGHT WILL PERSIST THROUGH
MONDAY MORNING.

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

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

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

.DAYS TWO THROUGH SEVEN... MONDAY THROUGH SATURDAY

AN EXTENDED PERIOD OF VERY LOW RELATIVE HUMIDITY WILL CONTINUE THE
HIGH FIRE DANGER IN THE MOUNTAINS AND VALLEYS OF LOS ANGELES AND
VENTURA COUNTIES THROUGH TUESDAY. HAZARDOUS WEATHER IS NOT EXPECTED
WEDNESDAY THROUGH SUNDAY. FROST ADVISORY AND FREEZE WARNING FOR
SANTA BARBARA COUNTIES WILL END MONDAY MORNING.

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

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

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

.SPOTTER INFORMATION STATEMENT...

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

FORWOOD