FNUS75 KRIW 251558
FWSRIW

SPOT FORECAST FOR SAND DRAW...BLM WOD
NATIONAL WEATHER SERVICE RIVERTON WY
858 AM MST THU FEB 25 2010

FORECAST IS BASED ON IGNITION TIME OF 0930 MST ON FEBRUARY 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

SMALL LOW PRESSURE AREA WILL MOVE SOUTH OF THE REGION TODAY INTO
SOUTHEASTERN WYOMING AND WESTERN NEBRASKA. LIGHT NORTHWEST LOW AND
MID LEVEL FLOW WILL PREDOMINATE TODAY. MID LEVEL MOISTURE BEHIND THE
DEPARTING LOW PRESSURE AREA TO THE SOUTH AND COLD MID LEVEL
TEMPERATURES WILL GENERATE ISOLATED SNOW SHOWERS THIS MORNING. SNOW
SHOWERS COULD MIX WITH RAIN AT TIMES THIS AFTERNOON...BEFORE
ENDING DURING THE LATE AFTERNOON/EARLY EVENING HOURS. GOOD MIXING
IS EXPECTED TODAY WITH COLDER AIRMASS ALOFT AND SMOKE DISPERSAL WILL
BE GOOD TO EXCELLENT THROUGH THE LATE AFTERNOON HOURS. HIGH PRESSURE
WILL BUILD ACROSS THE AREA TONIGHT AND FRIDAY WITH LIGHT TERRAIN
DRIVEN WINDS AND DRY WEATHER EXPECTED.

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

FORECASTER...SMITH

.TODAY...
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). ISOLATED SNOW
                    SHOWERS THROUGH THE DAY. ISOLATED SNOW SHOWERS
                    MIXED WITH RAIN IN THE AFTERNOON.
MAX TEMPERATURE.....36-39.
MIN HUMIDITY........40-43 PERCENT.
WIND (20 FT)........NORTHWEST 5-9 MPH.
RIDGE TOP WINDS.....NORTHWEST 12-18 MPH.
HAINES INDEX........2.
MIXING HEIGHT.......7000 FEET.
TRANSPORT WINDS.....NORTHWEST AROUND 15 MPH.
SMOKE DISPERSAL.....GOOD TO EXCELLENT.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT). SLIGHT CHANCE OF
                    SNOW SHOWERS IN THE EVENING.
MIN TEMPERATURE.....AROUND 20.
MAX HUMIDITY........72-75 PERCENT.
WIND (20 FT)........DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....NORTHWEST AROUND 10 MPH.
HAINES INDEX........2.
MIXING HEIGHT.......700 FEET.
TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
SMOKE DISPERSAL.....POOR.

.FRIDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....AROUND 40.
MIN HUMIDITY........27-30 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....WEST NORTHWEST 5-10 MPH.
HAINES INDEX........2.
MIXING HEIGHT.......2000 FEET.
TRANSPORT WINDS.....WEST NORTHWEST 5-8 MPH.
SMOKE DISPERSAL.....FAIR.

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 20S. WINDS
GENERALLY LESS THAN 10 MPH.
.SATURDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW. LOWS IN THE
MID 20S. HIGHS IN THE UPPER 30S. WINDS GENERALLY LESS THAN
10 MPH.
.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SNOW. LOWS IN THE
LOWER 20S. HIGHS IN THE LOWER 40S. WINDS GENERALLY LESS THAN
10 MPH.
.MONDAY...PARTLY CLOUDY. LOWS IN THE LOWER 20S. HIGHS IN THE MID
40S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...SMITH
REQUESTED BY...GABE HARRY
REASON FOR REQUEST...PRESCRIBED
.TAG 20100225.SANDD.01/RIW