FNUS75 KRIW 251339
FWSRIW

SPOT FORECAST FOR CHICKEN CREEK...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
739 AM MDT FRI SEP 25 2009

FORECAST IS BASED ON IGNITION TIME OF 0720 MDT ON SEPTEMBER 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

HIGH PRESSURE AT THE SURFACE AND ALOFT WILL PRODUCE ANOTHER DRY DAY WITH
ABOVE NORMAL TEMPERATURES...TERRAIN DRIVEN WINDS AND AFTERNOON
RELATIVE HUMIDITY IN THE UPPER SINGLE NUMBERS. A WEAK LOW PRESSURE SYSTEM
WILL MOVE ACROSS MONTANA SATURDAY. THIS SYSTEM WILL CAUSE WINDS TO
INCREASE SATURDAY AFTERNOON WITH WEST WIND GUSTING UP TO 30 MPH.
SATURDAY WILL ALSO BE DRY AND WARM.

...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS...
...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT...

FORECASTER...SMITH

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....AROUND 70.
MIN HUMIDITY........9-12 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....NORTHWEST 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......500 FT AGL INCREASING TO 8500 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.
SMOKE DISPERSAL.....POOR (7100 KNOT-FT) INCREASING TO GOOD (93900
                    KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....AROUND 40.
MAX HUMIDITY........52-55 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....WEST AROUND 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4000 FT AGL DECREASING TO 500 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....WEST AROUND 15 MPH.
SMOKE DISPERSAL.....POOR (4100-11900 KNOT-FT).

.SATURDAY...
SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....AROUND 70.
MIN HUMIDITY........12-15 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING WEST 15-20
                    MPH WITH GUSTS 25-30 MPH IN THE AFTERNOON.
RIDGE TOP WINDS.....WEST 10 TO 15 MPH INCREASING TO AROUND 30 MPH
                    LATE IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......800 FT AGL INCREASING TO 7000 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....WEST 15 TO 20 MPH INCREASING TO AROUND 30 MPH
                    LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (11700 KNOT-FT) INCREASING TO VERY GOOD
                    (135400 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...CLEAR. LOWS IN THE UPPER 30S. WEST WINDS AROUND
13 MPH.
.SUNDAY...CLEAR. LOWS IN THE LOWER 30S. HIGHS IN THE UPPER 60S.
WINDS GENERALLY LESS THAN 10 MPH.
.MONDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER
60S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS...THUNDERSTORMS
AND SNOW SHOWERS. LOWS AROUND 30. HIGHS IN THE UPPER 50S. WEST
WINDS AROUND 12 MPH.

$$

FORECASTER...SMITH
REQUESTED BY...KABER
REASON FOR REQUEST...PRESCRIBED
.TAG 20090925.CHICK.01/RIW