FNUS76 KSGX 210941
FWSSGX

SPOT FORECAST FOR SHEEP FIRE...SBNF FRON
NATIONAL WEATHER SERVICE SAN DIEGO CA
241 AM PDT WED OCT 21 2009

FORECAST IS BASED ON IGNITION TIME OF 0700 PDT ON OCTOBER 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...VERY DRY AND WARM TODAY THROUGH FRIDAY...

.DISCUSSION...
HIGH PRESSURE AT THE SURFACE OVER NEVADA AND A WEAK HIGH PRESSURE
RIDGE ALOFT WILL MAINTAIN A WEAK SANTA ANA WIND PATTERN THROUGH
AT LEAST THURSDAY MORNING. VERY LOW RELATIVE HUMIDITY AND LITTLE TO
NO OVERNIGHT RECOVERY OF HUMIDITY EXPECTED THROUGH FRIDAY. EACH
SUCCESSIVE DAY SHOULD BE 2 TO 6 DEGREES WARMER THAN THE PREVIOUS
DAY. BY THURSDAY AFTERNOON WEAKER OFFSHORE PRESSURE GRADIENTS
WILL ALLOW NORMAL UP AND DOWN SLOPE/CANYON WINDS TO PREVAIL. FOR
THE WEEKEND...STILL DRY AND WARM. HIGH PRESSURE RIDGE FORECAST TO
BREAK DOWN/FLATTEN ON MONDAY WITH A TROUGH MOVING INLAND TUESDAY.
A MODERATE SANTA ANA WIND EVENT IS POSSIBLE FOR THE SECOND HALF OF
NEXT WEEK SHOULD HIGH PRESSURE RIDGE REBUILD ALONG WEST COAST AS
ADVERTISED BY LATEST COMPUTER MODELS.

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....77 TO 82.
MIN HUMIDITY........10 TO 15 PERCENT.
WIND................
   SLOPES...........NORTH 10 MPH. GUSTS TO 20 MPH IN THE MORNING.
   RIDGETOP.........NORTH 15 TO 20 MPH AND GUSTY...BECOMING 5 TO 10
                    MPH IN THE AFTERNOON.
CHC WETTING RAIN....0 PERCENT.
LAL.................1.
MIXING HEIGHT.......500 FT AGL...BECOMING 5500-6500 FT AGL LATE IN
                    THE MORNING.
MIXING WINDS........NORTH 10 TO 15 MPH.

TIME (PDT)      7 AM      10 AM     1 PM      4 PM
SKY (%).........5         5         6         6
WEATHER COV.....
WEATHER TYPE....NONE      NONE      NONE      NONE
TEMP............46        63        79        81
RH..............42        22        13        13
20 FT WIND DIR..N         N         N         N
20 FT WIND SPD..8         8         4         4
20 FT WIND GUST.20        20        10        10

.TONIGHT...

SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....AROUND 50.
MAX HUMIDITY........30 PERCENT.
WIND................
   SLOPES...........NORTH 5 MPH WITH GUSTS 15 MPH IN THE EVENING.
   RIDGETOP.........NORTH 10 TO 15 MPH BECOMING NORTHEAST 15 TO 20
                    MPH LATE IN THE EVENING.
CHC WETTING RAIN....0 PERCENT.
LAL.................1.
MIXING HEIGHT.......500 FT AGL.
MIXING WINDS........NORTH 5 TO 10 MPH.

.THURSDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....79 TO 84.
MIN HUMIDITY........10 PERCENT.
WIND................
   SLOPES...........NORTH 5 TO 10 MPH IN THE MORNING...
                    UP SLOPE/SOUTHEAST 5 MPH IN THE AFTERNOON.
   RIDGETOP.........NORTHEAST 10 TO 15 MPH IN THE MORNING...
                    NORTHWEST 5 MPH IN THE AFTERNOON.
CHC WETTING RAIN....0 PERCENT.
LAL.................1.
MIXING HEIGHT.......7500 FT AGL.
MIXING WINDS........NORTHWEST 5 MPH.

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...
CLEAR. LOWS AROUND 52. HIGHS 81 TO 86. WINDS SOUTHEAST 5 MPH.
.SATURDAY...
CLEAR. LOWS AROUND 53. HIGHS 81 TO 86. WINDS SOUTH 5 MPH.
.SUNDAY...
MOSTLY CLEAR. LOWS AROUND 53. HIGHS 80 TO 85. WINDS WEST 5 MPH.

$$
FORECASTER...ROB BALFOUR
REQUESTED BY...JASON FOX
TYPE OF REQUEST...PRESCRIBED
.TAG 20091021.SHEEP.01/SGX