FNUS75 KRIW 171017
FWSRIW

SPOT FORECAST FOR LOWER GROS VENTRE RX...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
417 AM MDT FRI SEP 17 2010

FORECAST IS BASED ON IGNITION TIME OF 1735 MDT ON SEPTEMBER 16.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...DRY WEATHER TO CONTINUE TODAY THROUGH SATURDAY.
SUNDAY ALSO LOOKS DRY THROUGH MOST OF THE DAY. THERE IS THE
THREAT ISOLATED SHOWER OR THUNDERSTORM ACTIVITY AFTER 6 PM
SUNDAY EVENING. THIS LEADS INTO A CHANCE OF SHOWERS AND A FEW
THUNDERSTORMS TOWARD MONDAY MORNING AND DURING THE DAY MONDAY.
AN AFTERNOON AND EARLY EVENING BREEZE CAN BE EXPECTED TODAY
AND AGAIN ON SATURDAY. SUNDAY LOOKS TO BE WINDIER AHEAD OF THE
STORM SYSTEM.

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

FORECASTER...AR

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).
MAX TEMPERATURE.....71-76.
MIN HUMIDITY........15-20 PERCENT.

20 FOOT WINDS.......UPSLOPE/UPVALLEY OR EAST NORTHEAST 5-8 MPH IN THE MORNING.
                    WIND BECOMING SOUTHWEST AT 8 TO 13 MPH WITH
                    GUSTS AROUND 18 MPH AFTER 1200.

RIDGE TOP WINDS.....SOUTH TO SOUTHWEST 6 TO 11 MPH IN THE MORNING.
                    WIND BECOMING SOUTHWEST AT 15 TO 20 MPH WITH
                    GUSTS AROUND 25 MPH AFTER 1200.

LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 6000-7000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH TO SOUTHWEST AT 10 TO 15 MPH IN THE MORNING.
                    WEST TO SOUTHWEST 20 TO 25 MPH AFTER 1200.
SMOKE DISPERSAL.....INCREASING TO VERY GOOD IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....40-45.
MAX HUMIDITY........50-55 PERCENT.

20 FOOT WINDS.......SOUTHWEST AT 5 TO 10 MPH UNTIL SUNSET...THEN
                    BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH BY MIDNIGHT.

RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH UNTIL SUNSET...THEN SOUTH
                    TO SOUTHWEST AT 5 TO 10 MPH BY MIDNIGHT.

LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO 1000 FT AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH IN THE EVENING...
                    BECOMING SOUTH TO SOUTHWEST AROUND 10 MPH BY
                    MIDNIGHT.
SMOKE DISPERSAL.....VERY GOOD...DECREASING TO POOR AROUND MIDNIGHT.

.SATURDAY...
SKY/WEATHER.........INCREASING HIGH LEVEL CLOUDS (45-55 PERCENT).
MAX TEMPERATURE.....68-73.
MIN HUMIDITY........15-20 PERCENT.

20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-8 MPH IN THE MORNING.
                    BECOMING SOUTHWEST AT 10 TO 15 MPH WITH
                    GUSTS AROUND 20 MPH AFTER 1200.

RIDGE TOP WINDS.....SOUTH TO SOUTHWEST AT 6 TO 11 MPH IN THE MORNING.
                    SOUTHWEST AT 17 TO 22 MPH WITH GUSTS TO 30 MPH
                    AFTER 1200.

LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 6000-7000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH TO SOUTHWEST 10 TO 15 MPH IN THE MORNING.
                    WEST TO SOUTHWEST 20 TO 25 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....INCREASING TO VERY GOOD IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...

.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE LOWER 40S. WINDS
WEST TO SOUTHWEST WIND 10 TO 15 MPH.

.SUNDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND ISOLATED
THUNDERSTORMS AFTER 6 PM. HIGHS AROUND 70.
SOUTHWEST WIND 15 TO 25 WITH HIGHER GUSTS IN THE AFTERNOON.

.MONDAY...MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS AROUND 40. HIGHS IN THE LOWER 60S.
WEST TO SOUTHWEST WINDS 10 TO 15 MPH IN THE AFTERNOON.

.TUESDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS. LOWS IN 30S.
HIGHS IN THE UPPER 50S. WINDS GENERALLY AROUND 10 MPH IN THE
AFTERNOON.

$$

FORECASTER...ROSS
REQUESTED BY...SEAN CAREY
REASON FOR REQUEST...PRESCRIBED
.TAG 20100916.LOWER.02/RIW