FNUS75 KRIW 191452
FWSRIW

SPOT FORECAST FOR SAND DRAW...BLM WOD
NATIONAL WEATHER SERVICE RIVERTON WY
852 AM MDT FRI MAR 19 2010

FORECAST IS BASED ON IGNITION TIME OF 1030 MDT ON MARCH 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A COLD CANADIAN STORM SYSTEM CONTINUES TO MOVE SOUTHWARD THROUGH
SOUTHERN WYOMING THIS MORNING. COLD AIR ALOFT ASSOCIATED WITH THE
STORM WILL COMBINE WITH DAYTIME HEATING THIS AFTERNOON TO PRODUCE
WIDELY SCATTERED SNOW SHOWERS ALONG THE WEST SLOPES OF THE BIG
HORN MOUNTAINS. AN INCH OR TWO IS POSSIBLE WITH THE HEAVIER
SHOWERS. NORTHERLY FLOW ALOFT WILL CONTINUE OVER THE BURN AREA
THROUGH TONIGHT WITH COLD...MAINLY CLEAR CONDITIONS. HIGH PRESSURE
RETURNS TO THE REGION ON SATURDAY ALONG WITH A DRYING AND WARMING
TREND.

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

FORECASTER...CHURCH

.TODAY...
SKY/WEATHER.........MOSTLY CLOUDY (60-80 PERCENT). AREAS OF LIGHT
                    SNOW LIKELY IN THE MORNING...THEN SCATTERED SNOW
                    SHOWERS IN THE AFTERNOON.
MAX TEMPERATURE.....31-34.
MIN HUMIDITY........40-44 PERCENT.
WIND (20 FT)........NORTH TO NORTHEAST 3 TO 7 MPH.
RIDGE TOP WINDS.....NORTH TO NORTHEAST 4 TO 9 MPH.
HAINES INDEX........3. LOW POTENTIAL FOR RAPID FIRE GROWTH.
MIXING HEIGHT.......3450 FEET.
TRANSPORT WINDS.....NORTHEAST 12 MPH.
SMOKE DISPERSAL.....FAIR.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (60-75 PERCENT) IN THE EVENING THEN BECOMING
                    PARTLY CLOUDY (35-45 PERCENT). SCATTERED SNOW
                    SHOWERS IN THE EVENING....THE ISOLATED SNOW SHOWERS UNTIL
                    ABOUT 0300.
MIN TEMPERATURE.....14-18.
MAX HUMIDITY........67-71 PERCENT.
WIND (20 FT)........DOWNSLOPE 3 TO 6 MPH UNTIL ABOUT MIDNIGHT THEN DOWNVALLEY 4 TO 8 MPH.
RIDGE TOP WINDS.....BECOMING NORTHWEST 4 TO 9 MPH EARLY IN THE
                    NIGHT...THEN NORTHWEST 10 TO 16 MPH AFTER MIDNIGHT.
HAINES INDEX........2. VERY LOW POTENTIAL FOR RAPID FIRE GROWTH.
MIXING HEIGHT.......600 FEET.
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.
SMOKE DISPERSAL.....POOR.

.SATURDAY...
SKY/WEATHER.........MOSTLY SUNNY. (10-20 PERCENT).
MAX TEMPERATURE.....41-45.
MIN HUMIDITY........22-26 PERCENT.
WIND (20 FT)........UPVALLEY 3-6 MPH UNTIL APPROXIMATELY
                    1200-1300... THEN BECOMING WEST-NORTHWEST
                    11-14 MPH WITH GUSTS TO 18 MPH.
RIDGE TOP WINDS.....NORTHWEST 10 TO 15 MPH UNTIL ABOUT 1200...THEN BECOMING
                    NORTHWEST 15 TO 20 MPH THEREAFTER.
HAINES INDEX........3. LOW POTENTIAL FOR RAPID FIRE GROWTH.
MIXING HEIGHT.......3350 FEET.
TRANSPORT WINDS.....NORTHWEST 15 TO 20 MPH.
SMOKE DISPERSAL.....GOOD.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 20S. NORTHWEST WIND 10 TO 15 MPH.
.SUNDAY...WARMER. PARTLY CLOUDY. LOWS IN THE LOWER 30S. HIGHS IN
THE LOWER 50S. WEST WIND 10 TO 15 MPH.
.MONDAY...CLOUDY WITH CHANCE OF SHOWERS AND SNOW SHOWERS. LOWS IN
THE UPPER 20S. HIGHS IN THE UPPER 40S. WEST TO SOUTHWEST WIND 15 TO 20 MPH.
.TUESDAY...MOSTLY CLOUDY WITH CHANCE OF RAIN AND SNOW. LOWS IN
THE MID 20S. HIGHS IN THE LOWER 40S. NORTH TO NORTHEAST WIND 10 TO 15 MPH.

$$

FORECASTER...CHURCH
REQUESTED BY...GABE HARRY
REASON FOR REQUEST...PRESCRIBED
.TAG 20100319.SANDD.01/RIW