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FIRE WEATHER PLANNING FORECAST FOR SOUTHWESTERN CALIFORNIA
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
338 PM PDT THU SEP 2 2010
DISCUSSION...UPPER LEVEL RIDGING WILL CONTINUE TO BUILD FROM THE SOUTHEAST...PEAKING ON FRIDAY AS IT CENTERS OVER SOUTHERN CALIFORNIA. TEMPERATURES WILL CONTINUE TO WARM THROUGH FRIDAY AS A RESULT...THEN HOLD STEADY ON SATURDAY. HOT TRIPLE DIGIT TEMPERATURES ARE EXPECTED IN THE WARMEST VALLEYS AND MOUNTAINS. HUMIDITIES WILL LOWER THROUGH THE END OF THE WEEK...REACHING THE TEENS AND SINGLE DIGITS IN THE DRIEST SPOTS. WITH A LITTLE BIT OF MOISTURE LINGERING AROUND HOWEVER...THEY WILL NOT LOWER AS LOW AS USUAL WITH SUCH HOT TEMPERATURES. ADDING TO THAT RELATIVELY LIGHT WINDS...AND CRITICAL FIRE CONDITIONS ARE NOT EXPECTED. MODEST NIGHTTIME RECOVERIES ARE EXPECTED AS WELL...EXCEPT FOR SOME OF THE HIGHER PEAKS WITH HUMIDITIES STAYING CLOSE TO THE TEENS. A SHALLOW MARINE LAYER SHOULD PERSIST AS WELL ALONG THE IMMEDIATE COASTS WITH DENSE FOG. THE RIDGE BREAKS DOWN NEXT WEEK...WITH COOLING SUNDAY THROUGH THE MIDDLE OF THE WEEK AS A TROUGH DROPS DOWN INTO THE WESTERN UNITED STATES. EVEN WITH THE COOLING...SATURDAY NIGHT INTO SUNDAY MAY BRING A BRIEF WINDOW WITH THE MOST SIGNIFICANT FIRE WEATHER CONDITIONS...AS DRIER AIR MOVES IN FROM THE NORTHWEST AND WEST TO NORTHWEST WINDS INCREASE. THE MOUNTAINS AND INTERIOR VALLEYS MAY SEE SEVERAL HOURS OF CRITICAL CONDITIONS AS A RESULT. CAZ241SAN LUIS OBISPO COUNTY CENTRAL COAST-
SANTA BARBARA COUNTY CENTRAL COAST-
338 PM PDT THU SEP 2 2010
.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR EXCEPT AREAS OF LOW CLOUDS AND DENSE
FOG.
MIN TEMPERATURE.....50-59 EXCEPT 60-64 IN THE HILLS.
24 HR TREND......LITTLE CHANGE.
MAX HUMIDITY........80-100 PERCENT EXCEPT 60-80 PERCENT IN THE
HILLS.
24 HR TREND......LITTLE CHANGE.
20-FOOT WINDS.......WEST 8-15 MPH IN THE EVENING BECOMING
VARIABLE 3-6 MPH.
MARINE LAYER........500 FT ASL.
LIGHTNING ACTIVITY LEVEL.................1.
CWR (>0.10 IN)......0 PERCENT.
.FRIDAY...
SKY/WEATHER.........MOSTLY SUNNY EXCEPT AREAS OF MORNING LOW CLOUDS
AND DENSE FOG.
MAX TEMPERATURE.....59-67 NEAR THE COAST TO 81-93 INLAND.
24 HR TREND......LITTLE CHANGE.
MIN HUMIDITY........65-80 PERCENT NEAR THE COAST TO 20-40 PERCENT
INLAND.
24 HR TREND......LITTLE CHANGE.
20-FOOT WINDS.......VARIABLE 3-6 MPH BECOMING WEST TO NORTHWEST 8-15 MPH
WITH LOCAL GUSTS TO 20 MPH IN THE AFTERNOON.
MARINE LAYER........500 FT ASL.
LIGHTNING ACTIVITY LEVEL.................1.
CWR (>0.10 IN)......0 PERCENT.
.FRIDAY NIGHT...
SKY/WEATHER.........MOSTLY CLEAR EXCEPT PATCHY LOW CLOUDS AND FOG
AFTER MIDNIGHT.
MIN TEMPERATURE.....51-60 EXCEPT 61-66 IN THE HILLS.
MAX HUMIDITY........80-100 PERCENT EXCEPT 50-70 PERCENT IN THE
HILLS.
20-FOOT WINDS.......NORTHWEST 8-15 MPH WITH LOCAL GUSTS TO 20 MPH
IN THE EVENING BECOMING VARIABLE 3-6 MPH.
LIGHTNING ACTIVITY LEVEL.................1.
CWR (>0.10 IN)......0 PERCENT.
.SATURDAY...
SKY/WEATHER.........MOSTLY SUNNY EXCEPT PATCHY MORNING LOW CLOUDS
AND FOG.
MAX TEMPERATURE.....59-68 NEAR THE COAST TO 83-95 INLAND.
MIN HUMIDITY........60-75 PERCENT NEAR THE COAST TO 18-35 PERCENT
INLAND.
20-FOOT WINDS.......VARIABLE 3-6 MPH BECOMING NORTHWEST 8-18 MPH
WITH LOCAL GUSTS TO 25 MPH IN THE AFTERNOON.
LIGHTNING ACTIVITY LEVEL.................1.
CWR (>0.10 IN)......0 PERCENT.
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