FNUS75 KRIW 171426
FWSRIW

SPOT FORECAST FOR BEARTOOTH FACE...USFS SHF
NATIONAL WEATHER SERVICE RIVERTON WY
826 AM MDT THU SEP 17 2009

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON SEPTEMBER 17.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A STRONG UPPER LEVEL HIGH CENTERED OVER THE WYOMING-MONTANA-SOUTH
DAKOTA TRIPLE POINT THIS MORNING WILL CONTINUE TO KEEP MAINLY DRY AND
WARM CONDITIONS OVER THE BURN AREA THROUGH FRIDAY. LIGHT UPSLOPE
FLOW WILL DOMINATE THE WIND PATTERN THROUGH FRIDAY AS WELL. SOUTHWEST
WIND WILL BEGIN TO INCREASE SATURDAY AFTERNOON...AHEAD OF AN
APPROACHING PACIFIC TROUGH.

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

FORECASTER...CHURCH

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....80-83.
MIN HUMIDITY........15-19 PERCENT.
20 FOOT WINDS.......WEST/SOUTHWEST 4 TO 8 MPH UNTIL ABOUT 1100...THEN
                    UPSLOPE 5-8 MPH.
RIDGE TOP WINDS.....SOUTH/SOUTHWEST 5 TO 9 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......5200 FT AGL INCREASING TO 9800 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTH/SOUTHWEST 8 TO 12 MPH. SMOKE DISPERSAL.....GOOD
                    (46300-82100 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (25-35 PERCENT).
MIN TEMPERATURE.....61-65.
MAX HUMIDITY........39-44 PERCENT.
20 FOOT WINDS.......DOWNSLOPE 3-6 MPH.
RIDGE TOP WINDS.....SOUTH/SOUTHWEST 4 TO 7 MPH...BECOMING NORTHWEST
                    5 TO 9 MPH AFTER MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5300 FT AGL DECREASING TO 700 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....SOUTH/SOUTHWEST 5 TO 10 MPH.
SMOKE DISPERSAL.....POOR TO FAIR (5100-44300 KNOT-FT).

.FRIDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (25-35 PERCENT).
MAX TEMPERATURE.....78-81.
MIN HUMIDITY........18-22 PERCENT.
20 FOOT WINDS.......UPSLOPE 4-8 MPH.
RIDGE TOP WINDS.....SOUTHEAST 4 TO 8 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4100 FT AGL INCREASING TO 7500 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST 5 TO 10 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR TO FAIR (18300-48500 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...MOSTLY CLEAR. LOWS IN THE LOWER 50S. SOUTH WIND 10 TO 15 MPH.
.SATURDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER 70S.
SOUTHWEST WIND 15 TO 20 MPH.
.SUNDAY...COOLER. MOSTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER
60S. WINDS GENERALLY LESS THAN 10 MPH.
.MONDAY...MOSTLY CLEAR. COOLER. LOWS IN THE MID 30S. HIGHS IN THE MID
60S. NORTH WIND 10 TO 15 MPH.

$$

FORECASTER...CHURCH
REQUESTED BY...CLINT DAWSON
REASON FOR REQUEST...PRESCRIBED
.TAG 20090917.BEART.01/RIW