...GUSTY NORTHEAST WINDS AND VERY LOW HUMIDITIES TO CONTINUE THROUGH
THANKSGIVING DAY...
...MORE GUSTY WINDS AND LOW HUMIDITIES EXPECTED FOR THE WEEKEND...
FNUS56 KLOX 242326
FWFLOX
FIRE WEATHER PLANNING FORECAST FOR SOUTHWESTERN CALIFORNIA
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
330 PM PST TUE NOV 24 2009
...GUSTY NORTHEAST WINDS AND VERY LOW HUMIDITIES TO CONTINUE THROUGH
THANKSGIVING DAY...
...MORE GUSTY WINDS AND LOW HUMIDITIES EXPECTED FOR THE WEEKEND...
.DISCUSSION...STRONG OFFSHORE FLOW CONTINUES AS HIGH PRESSURE
REMAINS ANCHORED OVER THE GREAT BASIN. GUSTY WINDS AND VERY LOW
HUMIDITIES ARE EXPECTED TO CONTINUE RIGHT ON THROUGH THURSDAY
MORNING, WITH THE LOW HUMIDITIES LASTING THROUGH THURSDAY EVENING.
THE STRONGEST WINDS WILL OCCUR TODAY AND WEDNESDAY ACROSS VENTURA
AND LOS ANGELES COUNTIES, WITH SOMEWHAT LESS WIND ON THANKSGIVING
DAY. OVERNIGHT HUMIDITY RECOVERIES WILL BE POOR ACROSS THOSE AREAS
AS WELL. AFTER COORDINATION WITH LOCAL AGENCIES, A RED FLAG WARNING
HAS NOT BEEN ISSUED DUE TO LIVE FUEL MOISTURES BEING ABOVE CRITICAL
LEVELS. HOWEVER, DEAD FUEL MOISTURES ARE EXTREMELY LOW AND BECAUSE
OF THIS THERE IS STILL A VERY HIGH FIRE DANGER. THE SITUATION WILL
BE CLOSELY MONITORED AND THE POTENTIAL STILL EXISTS FOR A RED FLAG
WARNING TO BE POSTED FOR THIS EVENT SHOULD IT BE DETERMINED THAT THE
FUELS ARE DRY ENOUGH TO SUPPORT IT.
OFFSHORE FLOW WILL WEAKEN RAPIDLY THANKSGIVING DAY AS A LOW PRESSURE
AREA APPROACHES THE AREA FROM THE WEST. ALTHOUGH NO PRECIPITATION IS
EXPECTED LOCALLY FROM THIS SYSTEM, IT WILL USHER IN MUCH COOLER
TEMPERATURES AND HIGHER HUMIDITIES TO THE AREA STARTING FRIDAY AS
ONSHORE FLOW RETURNS.
THE RETURN TO ONSHORE FLOW WILL BE EXTREMELY BRIEF AS SURFACE HIGH
PRESSURE QUICKLY BUILDS OVER THE GREAT BASIN FRIDAY NIGHT INTO
SATURDAY. THIS WILL BRING ANOTHER ROUND OF GUSTY SANTA ANA WINDS TO
THE AREA WITH HUMIDITIES AGAIN DROPPING TO BELOW CRITICAL LEVELS.
INITITALLY TEMPERATURES WILL BE QUITE A BIT COOLER THAN THE CURRENT
OFFSHORE WIND EVENT DUE TO THE COLD AIR FROM FRIDAY`S LOW PRESSURE
SYSTEM. HOWEVER, THE HUMIDITY AND WIND COMPONENT OF THE RED FLAG
WARNING SYSTEM WILL LIKELY BE MET OVER THE WEEKEND AND POSSIBLY INTO
MONDAY AS WELL. ISSUANCE OF ANY WATCHES OR WARNINGS WILL REQUIRE
COORDINATION WITH AGENCIES AND INPUT ON FUEL CONDITIONS.
CAZ246-251715-
SANTA MONICA MOUNTAINS RECREATIONAL AREA-
330 PM PST TUE NOV 24 2009
.TONIGHT...
SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....55-65.
24 HR TREND......LITTLE CHANGE.
MAX HUMIDITY........12-22 PERCENT.
24 HR TREND......DOWN 5-10.
20-FOOT WINDS.......
VALLEYS/LWR SLOPES...NORTHEAST 15-25 MPH. GUSTS TO 45 MPH
BELOW PASSES AND CANYONS.
RIDGES/UPR SLOPES....NORTHEAST 20-30 MPH. LOCAL GUSTS TO 60 MPH.
MARINE LAYER........NONE.
LAL.................1.
CWR (>0.10 IN)......0 PERCENT.
.WEDNESDAY...
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....68-78.
24 HR TREND......UP 5.
MIN HUMIDITY........5-10 PERCENT.
24 HR TREND......LITTLE CHANGE.
20-FOOT WINDS.......
VALLEYS/LWR SLOPES...NORTHEAST 15-25 MPH. GUSTS TO 45 MPH BELOW
PASSES AND CANYONS.
RIDGES/UPR SLOPES....NORTHEAST 20-30 MPH. LOCAL GUSTS TO 60 MPH.
MARINE LAYER........NONE.
LAL.................1.
CWR (>0.10 IN)......0 PERCENT.
.WEDNESDAY NIGHT...
SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....55-65.
MAX HUMIDITY........15-25 PERCENT.
20-FOOT WINDS.......
VALLEYS/LWR SLOPES...NORTHEAST 10-15 MPH. GUSTS TO 30 MPH BELOW
PASSES AND CANYONS.
RIDGES/UPR SLOPES....NORTHEAST 15-25 MPH. LOCAL GUSTS TO 45 MPH.
LAL.................1.
CWR (>0.10 IN)......0 PERCENT.
.THANKSGIVING DAY...
SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....72-82.
MIN HUMIDITY........8-15 PERCENT.
20-FOOT WINDS.......
VALLEYS/LWR SLOPES...NORTHEAST 10-20 MPH. GUSTS TO 30 MPH BELOW
PASSES AND CANYONS IN THE MORNING.
RIDGES/UPR SLOPES....NORTHEAST 15-25 MPH. LOCAL GUSTS TO 45 MPH
IN THE MORNING.
LAL.................1.
CWR (>0.10 IN)......0 PERCENT.
...COASTS/VALLEYS INCLUDING THE SANTA MONICA RANGE...
.FRIDAY...MOSTLY CLEAR...EXCEPT PATCHY LOW CLOUDS AND FOG ALONG THE
COAST IN THE MORNING. LOWS IN THE UPPER 30S TO MID 50S. HIGHS IN THE
60S TO LOWER 70S. NORTHWEST WINDS 10 TO 20 MPH.
.SATURDAY...WINDY. MOSTLY CLEAR. LOWS IN THE UPPER 30S TO LOWER 50S.
HIGHS IN THE 60S TO LOWER 70S. NORTHEAST WINDS 20 TO 30 MPH. LOCAL
GUSTS TO 50 MPH...STRONGEST VENTURA AND LOS ANGELES COUNTIES.
.SUNDAY...WINDY. MOSTLY CLEAR. LOWS IN THE MID 30S TO LOWER 50S.
HIGHS IN THE 60S TO MID 70S. NORTHEAST WINDS 20 TO 30 MPH. LOCAL
GUSTS TO 50 MPH. STRONGEST VENTURA AND LOS ANGELES COUNTIES.
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