FNUS76 KSGX 151724
FWSSGX

SPOT FORECAST FOR COTTONWOOD...CNF DESC
NATIONAL WEATHER SERVICE SAN DIEGO CA
924 AM PST TUE DEC 15 2009

FORECAST IS BASED ON IGNITION TIME OF 0915 PST ON DECEMBER 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...DRY THROUGH THE NEXT SEVEN DAYS WITH PREDOMINATE EAST WINDS
DURING THE NIGHT AND MORNING HOURS...

.DISCUSSION...
TODAY THROUGH WEDNESDAY...EXPECT VARIABLE HIGH CLOUDS DUE TO
WEAKENING HIGH PRESSURE RIDGE ALOFT...HOWEVER A LARGE HIGH
PRESSURE CELL AT THE SURFACE...AND CENTERED OVER THE FOUR CORNERS
REGION...WILL CONTINUE TO CREATE AN OFFSHORE PRESSURE GRADIENT
ACROSS THE BURN SITE.

FOR THURSDAY THROUGH SUNDAY...THE HIGH PRESSURE RIDGE ALOFT TO
THE NORTH REBUILDS AND SHIFTS SLOWLY EASTWARD. THIS SHOULD PROVIDE
CLEAR SKIES AND CONTINUE THE DRY AIR AND INCREASE THE NORTHEAST
WINDS ACROSS THE BURN SITE.

FOR SATURDAY THROUGH NEXT MONDAY...THE HIGH PRESSURE RIDGE SHIFTS
EAST BUT STILL PROVIDES ENOUGH OFFSHORE PRESSURE GRADIENT TO
CREATE GUSTY EAST WINDS DURING THE EVENING AND LATE MORNING HOURS.

.TODAY...

SKY/WEATHER.........VARIABLE HIGH CLOUDS.
MAX TEMPERATURE.....AROUND 62.
MIN HUMIDITY........25 PERCENT.
WIND................
   SLOPES...........NORTHEAST 5 TO 10 MPH. GUSTS TO 20 MPH THROUGH
                    EARLY AFTERNOON.
   RIDGETOP.........EAST 5 MPH WITH GUSTS 20 MPH.
CHC WETTING RAIN....0 PERCENT.
LAL.................1.
MIXING HEIGHT.......2500-3500 FT AGL IN THE LATE MORNING AND EARLY
                    AFTERNOON.
MIXING WINDS........EAST 10 MPH.

.TONIGHT...

SKY/WEATHER.........VARIABLE HIGH CLOUDS.
MIN TEMPERATURE.....AROUND 40.
MAX HUMIDITY........45 PERCENT.
WIND................
   SLOPES...........NORTHEAST 5 TO 10 MPH.
   RIDGETOP.........EAST 5 MPH.
CHC WETTING RAIN....0 PERCENT.
LAL.................1.
MIXING HEIGHT.......500 FT AGL.
MIXING WINDS........EAST 10 MPH.

.WEDNESDAY...

SKY/WEATHER.........VARIABLE HIGH CLOUDS.
MAX TEMPERATURE.....AROUND 65.
MIN HUMIDITY........15 PERCENT.
WIND................
   SLOPES...........WINDS NORTHEAST 5 MPH WITH GUSTS 10 MPH.
   RIDGETOP.........EAST TO SOUTHEAST 5 MPH.
CHC WETTING RAIN....0 PERCENT.
LAL.................1.
MIXING HEIGHT.......500 FT AGL...BECOMING 2500-3500 FT AGL IN THE
                    LATE MORNING AND EARLY
                    AFTERNOON.
MIXING WINDS........EAST 5 MPH.

.FORECAST DAYS 3 THROUGH 7...
.THURSDAY...
MOSTLY CLEAR. LOWS AROUND 41. HIGHS AROUND 70. WINDS NORTHEAST 5 MPH.
MINIMUM RELATIVE HUMIDITY 15 PERCENT. MAXIMUM RELATIVE HUMIDITY
NEAR 50 PERCENT.
.FRIDAY...
MOSTLY CLEAR. LOWS AROUND 45. HIGHS AROUND 71. WINDS NORTHEAST
10 MPH WITH GUSTS 20 MPH. MINIMUM RELATIVE HUMIDITY 14 PERCENT. MAXIMUM
RELATIVE HUMIDITY NEAR 50 PERCENT.
.SATURDAY...
MOSTLY CLEAR. LOWS AROUND 44. HIGHS AROUND 65. WINDS EAST 10 MPH
IN THE MORNING SHIFTING TO WEST 5 MPH IN THE AFTERNOON. MINIMUM
RELATIVE HUMIDITY 15 PERCENT. MAXIMUM RELATIVE HUMIDITY
NEAR 50 PERCENT.
.SUNDAY THROUGH MONDAY...
MOSTLY CLEAR. LOWS AROUND 42. HIGHS 59 TO 64. WINDS EAST 5 TO 10
MPH WITH GUSTS 20 MPH IN THE EVENING AND LATE MORNING
HOURS. WINDS SHIFTING TO WEST IN THE AFTERNOON HOURS. MINIMUM
RELATIVE HUMIDITY 15 TO 25 PERCENT. MAXIMUM RELATIVE HUMIDITY NEAR
50 PERCENT.

$$
FORECASTER...ROB BALFOUR
REQUESTED BY...DAWN TINKER
TYPE OF REQUEST...PRESCRIBED
.TAG 20091215.COTTO.01/SGX