FNUS76 KSGX 121338
FWSSGX

SPOT FORECAST FOR COTTONWOOD PILE BURN...CNF DESC
NATIONAL WEATHER SERVICE SAN DIEGO CA
538 AM PST TUE JAN 12 2010

FORECAST IS BASED ON IGNITION TIME OF 0930 PST ON JANUARY 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...THE HIGH PRESSURE RIDGE ALOFT HAS PUSHED EAST OF THE
AREA AND IS WEAKENING. A TROUGH WILL MOVE ACROSS CENTRAL CALIFORNIA
TODAY AND REACH SOUTHERN CALIFORNIA BY WEDNESDAY MORNING. EXPECT
WINDS TO SHIFT TO THE SOUTHWEST THIS AFTERNOON AND INCREASE
THROUGH THE EVENING. A WEAK COLD FRONT WILL MOVE ACROSS THE BURN
AREA WEDNESDAY AND WEDNESDAY NIGHT FOR A CHANCE OF LIGHT WETTING
RAINS. LINGERING MOISTURE AND COOLER TEMPERATURES THURSDAY MORNING
WILL KEEP THE RELATIVE HUMIDITY FAIRLY HIGH. STRONG DRYING TREND
THURSDAY EVENING INTO FRIDAY WITH A RETURN OF OFFSHORE WIND
PATTERN AS HIGH PRESSURE REBUILDS TO THE NORTH. AN UPPER LEVEL
TROUGH MOVING ONSHORE THIS WEEKEND WILL REPLACE THE HIGH AND BRING
INCREASING CLOUDS AND COOLING. THIS WILL BE FOLLOWED BY A VERY WET
AND STORMY PATTERN NEXT WEEK.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....AROUND 68.
MIN HUMIDITY........15 PERCENT.
WIND................
 MID SLOPES.........UPSLOPE/EAST 3 TO 5 MPH IN THE MORNING...BECOMING
                    SOUTHWEST 5 MPH WITH GUSTS 10 MPH IN THE AFTERNOON.
 UPR SLP/RIDGETOP...SOUTH 5 MPH IN THE MORNING...BECOMING
                    SOUTHWEST IN THE AFTERNOON.
CWR.................5 PERCENT.
MIXING HEIGHT.......MODERATE INVERSION WITH 500 FT AGL UNTIL 0900 PST...
                    THEN MIXING TO 5000 FT AGL IN THE LATE MORNING AND
                    EARLY AFTERNOON.
MIXING WINDS........SOUTH TO SOUTHWEST 7 MPH.

.TONIGHT...

SKY/WEATHER.........INCREASING CLOUDS.
MIN TEMPERATURE.....AROUND 44.
MAX HUMIDITY........70 PERCENT.
WIND................
 MID SLOPES.........WEST TO SOUTHWEST 8 MPH WITH OCCASIONAL GUSTS 15 MPH
 UPR SLP/RIDGETOP...SOUTHWEST 15 MPH WITH GUSTS 20 MPH.
CWR.................5 PERCENT.
MIXING HEIGHT.......2500 FT AGL IN THE EVENING...BECOMING 500 FT AGL AFTER
                    MIDNIGHT UNDER WEAK INVERSION.
MIXING WINDS........SOUTHWEST 10 MPH.

.WEDNESDAY...

SKY/WEATHER.........BECOMING MOSTLY CLOUDY WITH A CHANCE OF RAIN.
                    RAINFALL AMOUNTS 0.09 INCHES.
MAX TEMPERATURE.....AROUND 55.
MIN HUMIDITY........60 PERCENT.
WIND................
 MID SLOPES.........WEST 5 TO 15 MPH. GUSTS TO 30 MPH IN THE AFTERNOON.
 UPR SLP/RIDGETOP...WEST 15 MPH WITH GUSTS TO 30 MPH.
CWR.................30 PERCENT.
MIXING HEIGHT.......500 FT AGL...BECOMING 2500 FT AGL LATE IN THE
                    MORNING.
MIXING WINDS........WEST 17 MPH.

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...MOSTLY CLOUDY WITH A 20 PERCENT CHANCE OF WETTING
RAIN AND ADDITIONAL RAINFALL AMOUNTS OF 0.06 INCHES. LOW AROUND 40.
MAXIMUM RELATIVE HUMID TY 100 PERCENT. WINDS WEST 15 MPH WITH GUSTS
30 MPH SHIFTING TO NORTHWEST OVERNIGHT

.THURSDAY...
PARTLY CLOUDY. HIGHS AROUND 60. MINIMUM RELATIVE HUMIDITY 20PERCENT.
WINDS NORTH 5 TO 15 MPH WITH GUSTS TO 25 MPH.
.FRIDAY...
MOSTLY CLEAR. LOWS AROUND 43. MAXIMUM RELATIVE HUMIDITY 35 PERCENT.
HIGHS AROUND 63. MINIMUM RELATIVE HUMIDITY 20 PERCENT. WINDS
EAST 5 TO 15 MPH WITH GUSTS 30 MPH AND GUSTY.
.SATURDAY...
PARTLY CLOUDY. LOWS AROUND 43. MAXIMUM RELATIVE HUMIDITY 35
PERCENT. HIGHS AROUND 61. MINIMUM RELATIVE HUMIDITY 20 PERCENT. WINDS
UPSLOPE 3 TO 5 MPH BECOMING SOUTHWEST 5 MPH IN THE AFTERNOON.

$$
FORECASTER...ROB BALFOUR
REQUESTED BY...BRIAN RHODES
TYPE OF REQUEST...PRESCRIBED
.TAG 20100112.COTTO.01/SGX