FNUS75 KRIW 182351
FWSRIW

SPOT FORECAST FOR BEARTOOTH FACE...IA CDC
NATIONAL WEATHER SERVICE RIVERTON WY
551 PM MDT FRI SEP 18 2009

FORECAST IS BASED ON IGNITION TIME OF 0655 MDT ON SEPTEMBER 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A FEW HIGH-BASED SHOWERS AND POSSIBLY AN ISOLATED THUNDERSTORM
TO THE WEST OF THE BURN AREA WILL DISSIPATE QUICKLY WITH SUNSET
THIS EVENING. OUTFLOWS FROM THESE SHOWERS SHOULD RESULT IN A WIND SHIFT
FROM THE WEST EARLY THIS EVENING WITH DOWNSLOPE WEST WINDS
CONTINUING TO PREVAIL OVERNIGHT.

AN UPPER LEVEL TROUGH WILL MOVE INTO THE NORTHWEST U.S. SATURDAY
WITH UPSLOPE WIND MIXING OUT FROM THE WEST SOUTHWEST IN THE
AFTERNOON...AND A FEW THUNDERSTORMS MOVING NORTHEAST OFF THE
MOUNTAINS INTO THE CODY FOOTHILLS PRODUCING GUSTY ERRATIC OUTFLOW
WINDS TO 40 MPH.

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

FORECASTER...MEUNIER

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY WITH ISOLATED SHOWERS OR THUNDERSTORMS
                    IN THE VICINITY (WEST OF THE BURN AREA OVER THE PEAKS)
                    THROUGH SUNSET THEN BECOMING MOSTLY CLEAR (10-30 PERCENT).
MIN TEMPERATURE.....61-64.
MAX HUMIDITY........35-40 PERCENT.
20 FOOT WINDS.......BECOMING WEST 5 TO 10 MPH WITH GUSTS TO 15 MPH BY
                    1900.
RIDGE TOP WINDS.....SOUTH 5 TO 8 MPH IN THE EVENING BECOMING SOUTHWEST AFTER
                    MIDNIGHT.
LAL.................2 UNTIL SUNSET THEN 1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE
                    GROWTH.
MIXING HEIGHT.......5200 FEET THROUGH SUNSET DECREASING TO 600 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTH SOUTHWEST 5 TO 10 MPH.
SMOKE DISPERSAL.....BECOMING POOR (6000-18600 KNOT-FT) AFTER SUNSET.

.SATURDAY...
SKY/WEATHER.........SUNNY (5-15 PERCENT) THEN BECOMING PARTLY
                    CLOUDY (35-45 PERCENT). ISOLATED SHOWERS AND
                    THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....80-83.
MIN HUMIDITY........15-18 PERCENT.
20 FOOT WINDS.......EAST SOUTHEAST 5-9 MPH WITH GUSTS TO 15 MPH BECOMING
                    WEST SOUTHWEST 10 TO 15 MPH WITH GUSTS 20 TO 25 MPH BETWEEN
                    1500 AND 1700. GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR THUNDERSTORMS IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH.
LAL.................1 UNTIL 1500...THEN 2.
CHC OF WETTING RAIN.6 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......6200 FT AGL INCREASING TO 11500 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 13 TO 18 MPH.
SMOKE DISPERSAL.....GOOD (67600 KNOT-FT) INCREASING TO EXCELLENT
                    (155000 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...PARTLY CLOUDY. ISOLATED SHOWERS AND
THUNDERSTORMS IN THE EVENING...THEN SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE UPPER 40S. WEST WINDS
AROUND 13 MPH.
.SUNDAY...COOLER. MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 30S. HIGHS IN THE LOWER 60S.
WINDS GENERALLY LESS THAN 10 MPH.
.MONDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER
50S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...WARMER. MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN
THE LOWER 70S. WINDS GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE MID
70S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...CLINT DAWSON
REASON FOR REQUEST...PRESCRIBED
.TAG 20090918.BEART.01/RIW