FNUS75 KRIW 271429
FWSRIW

SPOT FORECAST FOR TROUT CREEK...BIA WIND RIVER AGENCY
NATIONAL WEATHER SERVICE RIVERTON WY
829 AM MDT SAT AUG 27 2011

FORECAST IS BASED ON REQUEST TIME OF 0801 MDT ON AUGUST 27.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A HOT AND MAINLY DRY DAY. HOWEVER...WINDS ARE EXPECTED TO BE RATHER
LIGHT AND MAINLY TERRAIN DRIVEN UNLESS A SHOWER OR THUNDERSTORM
POPS UP OVER THE HIGHER TERRAIN THIS AFTERNOON.

A DISTURBANCE WILL BEGIN TO AFFECT THE REGION LATE THIS AFTERNOON
WITH THUNDERSTORMS POSSIBLE AFTER 1400. SHOWERS AND THUNDERSTORMS
ARE EXPECTED TO INCREASE IN COVERAGE BY EARLY EVENING WITH THE
BEST SHOT OF THUNDERSTORMS BETWEEN 6 PM AND MIDNIGHT.
HOWEVER...ISOLATED THUNDERSTORMS WILL REMAIN POSSIBLE EVEN AFTER
MIDNIGHT DUE TO THE UPPER LEVEL SUPPORT FROM THE DISTURBANCE AND
THE HEALTHY AMOUNT OF RESIDUAL MOISTURE. WINDS WILL INCREASINGLY
BECOME OUTFLOW DOMINATED BY LATE AFTERNOON INTO THE EVENING...AS
THE AREA BECOMES AFFECTED BY THUNDERSTORMS.

WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE
SUNDAY...WITH TEMPERATURES SLIGHTLY COOLER...RH A BIT HIGHER THAN
WHAT OCCURS TODAY. THIS TREND WILL CONTINUE THROUGH MONDAY WITH
COOLING TEMPERATURES AND RISING RH.

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

FORECASTER...ALLEN

.TODAY...
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS.
MAX TEMPERATURE.....76-79.
MIN HUMIDITY........18-21 PERCENT.
20 FOOT WINDS.......WEST WINDS AROUND 10 MPH AND GUSTY EARLY IN THE
                    MORNING BECOMING UPSLOPE/UPVALLEY 5-9 MPH.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS.
RIDGE TOP WINDS.....WEST 10 TO 15 MPH GUSTING TO 25 MPH AFTER 1300.
LAL.................2.
CHC OF WETTING RAIN.10 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2800-3800 FT AGL INCREASING TO 8200-9200 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 10 TO 17 MPH.
SMOKE DISPERSAL.....POOR (34100 KNOT-FT) INCREASING TO GOOD (85700
                    KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) BECOMING PARTLY
                    CLOUDY (40-50 PERCENT) AFTER MIDNIGHT. ISOLATED
                    SHOWERS AND THUNDERSTORMS.
MIN TEMPERATURE.....54-57.
MAX HUMIDITY........58-65 PERCENT.
20 FOOT WINDS.......WEST 10-15 MPH AND GUSTY LATE IN THE
                    EVENING...THEN BECOMING DOWNSLOPE/DOWNVALLEY
                    4-7 MPH AFTER MIDNIGHT. GUSTY AND ERRATIC WINDS
                    EXPECTED NEAR THUNDERSTORMS IN THE EVENING.
RIDGE TOP WINDS.....NORTHWEST 15 TO 20 MPH SHIFTING TO THE WEST
                    AROUND 10 MPH AFTER MIDNIGHT.
LAL.................2.
CHC OF WETTING RAIN.15 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......8200-9200 FT AGL DECREASING TO 2800-3800 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST 12 TO 17 MPH.
SMOKE DISPERSAL.....GOOD (92400 KNOT-FT) DECREASING TO POOR (39000
                    KNOT-FT) AFTER MIDNIGHT.

.SUNDAY...
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS.
MAX TEMPERATURE.....72-75.
MIN HUMIDITY........26-29 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.
RIDGE TOP WINDS.....WEST AROUND 10 MPH SHIFTING TO THE NORTHEAST IN
                    THE AFTERNOON.
LAL.................2.
CHC OF WETTING RAIN.4 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......1900-2900 FT AGL INCREASING TO 5500-6500 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 12 TO 13 MPH SHIFTING TO THE NORTH AROUND
                    13 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR TO FAIR (22900-56500 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY NIGHT...PARTLY CLOUDY. SCATTERED SHOWERS AND
THUNDERSTORMS IN THE EVENING...THEN ISOLATED SHOWERS AND
THUNDERSTORMS AFTER MIDNIGHT. LOWS IN THE LOWER 50S. WINDS
GENERALLY LESS THAN 10 MPH.
.MONDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS AND THUNDERSTORMS.
LOWS IN THE LOWER 50S. HIGHS IN THE LOWER 70S. WINDS GENERALLY
LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS IN THE LOWER 70S.
SOUTHWEST WINDS AROUND 10 MPH.
.WEDNESDAY...PARTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS IN THE
MID 70S. SOUTHWEST WINDS AROUND 12 MPH.

$$

FORECASTER...ALLEN
REQUESTED BY...GEORGE WELLS
REASON FOR REQUEST...WILDFIRE
.TAG 20110827.TROUT.01/RIW