FNUS75 KRIW 151615
FWSRIW

SPOT FORECAST FOR SAND DRAW...WORLAND BLM
NATIONAL WEATHER SERVICE RIVERTON WY
915 AM MST THU JAN 15 2009

FORECAST IS BASED ON IGNITION TIME OF 0915 MST ON JANUARY 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A RIDGE OF HIGH PRESSURE WILL GRADUALLY SLIDE EAST INTO THE ROCKY
MOUNTAIN REGION THIS WEEKEND. THIS WILL TURN THE UPPER LEVEL FLOW
TO A MORE NORTHERLY DIRECTION OVER THE NEXT SEVERAL DAYS. AS THE
RIDGE MOVES FARTHER INLAND...TEMPERATURES WILL WARM AND CONDITIONS
WILL BECOME DRIER. A WEAK SYSTEM WILL DROP SOUTH THROUGH THE BIG
HORN BASIN LATE FRIDAY NIGHT AND EARLY SATURDAY MORNING. GUSTY
NORTHERLY WIND OF 10 TO 20 MPH WITH OCCASIONAL HIGHER GUSTS COULD
OCCUR ON SATURDAY IN THE WAKE OF THIS SYSTEM.

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

FORECASTER...JONES

.TODAY...
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (45-55 PERCENT). SLIGHT CHANCE OF
                    SNOW IN THE MORNING.
MAX TEMPERATURE.....36-39.
MIN HUMIDITY........50-55 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5 TO 9 MPH.
RIDGE TOP WINDS.....BECOMING NORTHWEST 8 TO 14 MPH BY 1300.
MIXING HEIGHT.......RISING TO BETWEEN 1000 AND 1500 AGL BY 1300.
TRANSPORT WINDS.....NORTHWEST 7 TO 12 MPH.
SMOKE DISPERSAL.....POOR.

.TONIGHT...
SKY/WEATHER.........BECOMING MOSTLY CLEAR (10-20 PERCENT) BY 2200.
MIN TEMPERATURE.....20-24.
MAX HUMIDITY........75-80 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4 TO 7 MPH.
RIDGE TOP WINDS.....WEST-NORTHWEST 5 TO 8 MPH.
MIXING HEIGHT.......DECREASING TO LESS THAN 500 FT AGL BY 1800.
TRANSPORT WINDS.....DOWNSLOPE/DOWNVALLEY 4 TO 8 MPH.
SMOKE DISPERSAL.....POOR.

.FRIDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....44-47.
MIN HUMIDITY........32-36 PERCENT.
20 FOOT WINDS.......BECOMING UPSLOPE/UPVALLEY 5 TO 8 MPH BY 1200.
RIDGE TOP WINDS.....WEST-NORTHWEST 7 TO 12 MPH.
MIXING HEIGHT.......RISING TO BETWEEN 1000 AND 1500 FT AGL BY 1300.
TRANSPORT WINDS.....WEST-NORTHWEST 8 TO 13 MPH.
SMOKE DISPERSAL.....POOR.

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...PARTLY CLOUDY. LOWS AROUND 20. NORTHERLY WIND
10 TO 20 MPH AND GUSTY AFTER LATE EVENING.
.SATURDAY...BECOMING MOSTLY CLEAR. LOWS AROUND 20. HIGHS IN THE
MID 40S. NORTHERLY WIND 10 TO 20 MPH AND GUSTY.
.SUNDAY...CLEAR. LOWS IN THE MID 20S. HIGHS IN THE UPPER 40S.
WINDS GENERALLY LESS THAN 10 MPH.
.MARTIN LUTHER KING JR DAY...CLEAR. LOWS IN THE UPPER 20S. HIGHS
IN THE LOWER 50S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...JONES
REQUESTED BY...ANDY ROTHLEUTNERT
REASON FOR REQUEST...PRESCRIBED
.TAG 20090115.SANDD.01/RIW