FNUS75 KRIW 151046
FWSRIW

SPOT FORECAST FOR LOWER GROS VENTRE RX...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
446 AM MDT WED SEP 15 2010

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON SEPTEMBER 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...THE WEATHER LOOKS DRY TODAY...TONIGHT AND THURSDAY.
WIND SPEEDS WILL BE FAIRLY LIGHT TODAY AND MAINLY TERRAIN DRIVEN AS
HIGH PRESSURE AT THE SURFACE WILL BE OVER THE AREA. THURSDAY WILL BE
A LITTLE WARMER AND DRIER WITH AN AFTERNOON BREEZE...MAINLY IN OPEN
AREAS AND OVER THE RIDGE TOPS.

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

FORECASTER...AR

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....65-69.
MIN HUMIDITY........25-30 PERCENT.

20 FOOT WINDS.......UPSLOPE/UPVALLEY AT 3 TO 6 MPH IN THE MORNING.
                    WEST TO SOUTHWEST AT 5 TO 9 MPH IN THE AFTERNOON.

RIDGE TOP WINDS.....SOUTH TO SOUTHWEST 4 TO 8 MPH IN THE MORNING.
                    WEST TO SOUTHWEST 10 TO 15 MPH IN THE AFTERNOON.

LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 5300-6300 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH TO SOUTHWEST 5 TO 10 MPH IN THE MORNING.
                    WEST TO SOUTHWEST 12 TO 15 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR...BECOMING GOOD IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY.
MIN TEMPERATURE.....38-42.
MAX HUMIDITY........70-75 PERCENT.

20 FOOT WINDS.......WEST TO SOUTHWEST AT 4 TO 8 MPH UNTIL 2100. THEN
                    BECOMING DOWNSLOPE/DOWNVALLEY 3 TO 6 MPH.

RIDGE TOP WINDS.....WEST TO SOUTHWEST 8 TO 13 MPH UNTIL 2100. THEN
                    BECOMING SOUTH AROUND 5 MPH BY MIDNIGHT.

LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO 800-1000 FT AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST AROUND 12 MPH UNTIL 2100. THEN BECOMING
                    SOUTH AT 5 TO 10 MPH BY MIDNIGHT.
SMOKE DISPERSAL.....BECOMING POOR BY MIDNIGHT.

.THURSDAY...
SKY/WEATHER.........PARTLY CLOUDY.
MAX TEMPERATURE.....70-75.
MIN HUMIDITY........17-22 PERCENT.

20 FOOT WINDS.......UPSLOPE/UPVALLEY AT 4 TO 8 MPH IN THE MORNING.
                    SOUTHWEST AT 7 TO 12 MPH IN THE AFTERNOON.

RIDGE TOP WINDS.....SOUTH TO SOUTHWEST 5 TO 10 MPH IN THE MORNING.
                    SOUTHWEST AT 10 TO 15 MPH WITH GUSTS AROUND 20 MPH
                    IN THE AFTERNOON.

LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 6500-7500 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH TO SOUTHWEST 10 TO 15 MPH IN THE MORNING.
                    SOUTHWEST AROUND 20 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR...INCREASING TO VERY GOOD IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...

.THURSDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 40S. WINDS
GENERALLY LESS THAN 10 MPH.

.FRIDAY...MOSTLY CLEAR. HIGHS IN THE UPPER 60S.
WEST TO SOUTHWEST WIND 10 TO 15 MPH IN THE AFTERNOON.

.SATURDAY...PARTLY CLOUDY. LOWS IN THE LOWER 40S. HIGHS IN THE
UPPER 60S. WINDS GENERALLY LESS THAN 10 MPH.

.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS IN
THE LOWER 40S. HIGHS IN THE UPPER 60S. WINDS GENERALLY LESS THAN
10 MPH.

$$

FORECASTER...ROSS
REQUESTED BY...MIKE JOHNSTON
REASON FOR REQUEST...PRESCRIBED
.TAG 20100915.LOWER.01/RIW