FNUS75 KRIW 241409
FWSRIW

SPOT FORECAST FOR LOWER GROS VENTRE RX...USFS
NATIONAL WEATHER SERVICE RIVERTON WY
809 AM MDT FRI SEP 24 2010

FORECAST IS BASED ON IGNITION TIME OF 1500 MDT ON SEPTEMBER 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
WEST FLOW ALOFT WILL BE OVER THE BURN AREA TODAY AND TONIGHT.  HIGH
PRESSURE WILL BUILD OVER THE GREAT BASIN AND NORTHERN ROCKIES TONIGHT
THROUGH THE WEEKEND BRINGING WARMER TEMPERATURES AND LOWER RELATIVE
HUMIDITY...AND DECREASING WIND ALOFT.


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

FORECASTER...C.BAKER

.TODAY...
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING
                    MOSTLY SUNNY BY 1 PM MDT (20-30 PERCENT).
MAX TEMPERATURE.....65-68.
MIN HUMIDITY........18-22 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST AROUND
                    12 MPH WITH GUSTS TO AROUND 20 MPH LATE IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......1800-2800 FT AGL INCREASING TO 5100-6100 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.
SMOKE DISPERSAL.....POOR EARLY (32300 KNOT-FT) INCREASING TO VERY GOOD
                    (100200 KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....30-35.
MAX HUMIDITY........55-60 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS AROUND 10 MPH AND GUSTY EARLY IN THE
                    EVENING BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH SHIFTING TO THE SOUTH
                    AROUND 10 MPH EARLY IN THE MORNING.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......5100-6100 FT AGL DECREASING TO 1700-2700 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST AROUND 20 MPH BECOMING SOUTH 5 TO 10 MPH
                    IN THE LATE EVENING AND OVERNIGHT.
SMOKE DISPERSAL.....GOOD (86900 KNOT-FT) DECREASING TO POOR (17300
                    KNOT-FT) BY 10 PM MDT.

.SATURDAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....70-75.
MIN HUMIDITY........16-20 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....SOUTH AROUND 10 MPH SHIFTING TO THE SOUTHWEST 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.......1800-2800 INCREASING TO 7000 FT AGL BY NOON.
TRANSPORT WINDS.....SOUTHEAST 7 TO 9 MPH SHIFTING TO THE WEST
                    AROUND 10 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR IN THE MORNING (7500-22200 KNOT-FT) THEN
                    GOOD (70000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...CLEAR. LOWS AROUND 40. WINDS GENERALLY LESS
THAN 10 MPH.
.SUNDAY...CLEAR. LOWS AROUND 40. HIGHS IN THE UPPER 70S. WINDS
GENERALLY LESS THAN 10 MPH.
.MONDAY...CLEAR. LOWS AROUND 40. HIGHS IN THE MID 70S. WINDS
GENERALLY LESS THAN 10 MPH.
.TUESDAY...CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE MID 70S.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...C.BAKER
REQUESTED BY...MIKE JOHNSTON
REASON FOR REQUEST...PRESCRIBED
.TAG 20100924.LOWER.01/RIW