FNUS75 KRIW 271750
FWSRIW

SPOT FORECAST FOR SAND DRAW...BLM WOD
NATIONAL WEATHER SERVICE RIVERTON WY
1050 AM MST MON DEC 27 2010

FORECAST IS BASED ON IGNITION TIME OF 1000 MST ON DECEMBER 28.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...NOTE THAT THIS FORECAST STARTS TUESDAY 12/28/10...

GENERALLY WESTERLY FLOW TODAY THROUGH TUESDAY MORNING BRINGING
SOME CLOUDINESS TO THE AREA WITH WINDS AROUND 10 MPH. A MAJOR STORM
SYSTEM WILL MOVE INTO THE CENTRAL ROCKIES WEDNESDAY THROUGH
THURSDAY NIGHT. AN ARCTIC FRONT IS EXPECTED TO PUSH DOWN TO THE
BURN AREA AROUND MIDNIGHT WEDNESDAY NIGHT...STARTING A PERIOD OF
SNOW AND DROPPING TEMPERATURES CONSIDERABLE COMPARED TO MONDAY AND
TUESDAY. SOUTH WINDS ARE EXPECTED AHEAD OF THE FRONT...WITH
NORTHWEST WINDS BEHIND THE FRONT. SMOKE DISPERSION STILL EXPECTED
TO BE POOR IN THE BURN AREA WITH THE BASIN INVERSIONS...RAWS DATA
SHOWS STRONGER WIND HIGHER UP ON THE SLOPE OF THE BIGHORNS.

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

FORECASTER...MCDONALD

.TUESDAY...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT).
MAX TEMPERATURE.....35-40.
MIN HUMIDITY........30-40 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....SOUTHEAST AROUND 10 TO 12 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......200-1000 FT AGL.
TRANSPORT WINDS.....SOUTHEAST AROUND 10 TO 12 MPH.
SMOKE DISPERSAL.....POOR (2000 TO 12000 KNOT-FT).

.TUESDAY NIGHT...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (70-80 PERCENT).
MIN TEMPERATURE.....20-25.
MAX HUMIDITY........75-80 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....SOUTH 5 TO 8 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......300-600 FT AGL.
TRANSPORT WINDS.....SOUTH 5 TO 8 MPH.
SMOKE DISPERSAL.....POOR (1500-4800 KNOT-FT).

.WEDNESDAY...
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SLIGHT CHANCE OF
                    SNOW IN THE AFTERNOON.
MAX TEMPERATURE.....35-38.
MIN HUMIDITY........45-50 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....SOUTHEAST 5 TO 8 MPH.
LAL.................1.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......700-1700 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 5 TO 8 MPH.
SMOKE DISPERSAL.....POOR (2500-13600 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...CLOUDY WITH CHANCE OF SNOW. LOWS AROUND 15.
WINDS NORTHWEST AROUND 20 MPH STARTING IN THE LATE EVENING.
.THURSDAY...MUCH COLDER. CLOUDY WITH SNOW LIKELY. LOWS AROUND 5.
HIGHS AROUND 15. WINDS AROUND 12 MPH FROM THE NORTHWEST.
.FRIDAY...MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS AROUND
3 BELOW. HIGHS AROUND 7. WINDS GENERALLY LESS THAN 10 MPH.
.NEW YEARS DAY...NOT AS COLD. PARTLY CLOUDY. LOWS AROUND 2 BELOW.
HIGHS AROUND 18. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MCDONALD
REQUESTED BY...SAGE DECKER
REASON FOR REQUEST...PRESCRIBED
.TAG 20101229.SANDD.01/RIW