FNUS75 KRIW 091649
FWSRIW

SPOT FORECAST FOR SAND DRAW...BLM WOD
NATIONAL WEATHER SERVICE RIVERTON WY
949 AM MST TUE FEB 9 2010

FORECAST IS BASED ON IGNITION TIME OF 1100 MST ON FEBRUARY 09.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A FLATTENING HIGH PRESSURE RIDGE WILL KEEP THE AREA PRECIPITATION
FREE THROUGH FRIDAY. A TROUGH OF LOW PRESSURE ALONG THE PACIFIC COAST WILL SPLIT
AS IT ENCOUNTERS THE RIDGE OVER THE WESTERN UNITED STATES. AS THE WEAKENING
TROUGH APPROACHES...THE GRADIENT WILL INCREASE RESULTING IN INCREASING WINDS
THROUGH THE PERIOD. WEAK IMPULSES WITHIN THE NORTHWESTERLY NORTHERN STREAM FLOW
WILL JUST BERING SOME CLOUDS INTO THE AREA BY MID WEEK.

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

FORECASTER...LIPSON

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....26-29.
MIN HUMIDITY........37-40 PERCENT.
WIND (20 FT)........WEST TO NORTHWEST 5-9 MPH WITH A FEW GUSTS TO BETWEEN 10
                    AND 20 MPH.
RIDGE TOP WINDS.....NORTHWEST 10 MPH.
HAINES INDEX........3.
MIXING HEIGHT.......2000 FEET AGL.
TRANSPORT WINDS.....SOUTH SOUTHWEST 10 TO 20 MPH.
SMOKE DISPERSAL.....FAIR.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....11-14.
MAX HUMIDITY........61-64 PERCENT.
WIND (20 FT)........DOWNSLOPE/DOWNVALLEY FROM THE EAST SOUTHEAST AT 4-7 MPH
                    BECOMING EAST AT 4 TO 7 MPH AFTER MIDNIGHT.
RIDGE TOP WINDS.....NORTHWEST 5 TO 10 MPH.
HAINES INDEX........2.
MIXING HEIGHT.......300 FEET AGL.
TRANSPORT WINDS.....LIGHT AND VARIABLE.
SMOKE DISPERSAL.....POOR.

.WEDNESDAY...
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT).
MAX TEMPERATURE.....29-32.
MIN HUMIDITY........34-37 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....NORTHWEST 5 MPH.
HAINES INDEX........2.
MIXING HEIGHT.......1800 FEET AGL.
TRANSPORT WINDS.....LIGHT AND VARIABLE.
SMOKE DISPERSAL.....POOR.

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...PARTLY CLOUDY. LOWS AROUND 18. WINDS GENERALLY
LESS THAN 10 MPH.
.THURSDAY...PARTLY CLOUDY. LOWS IN THE LOWER 20S. HIGHS IN THE
MID 30S. WINDS GENERALLY LESS THAN 10 MPH.
.FRIDAY...PARTLY CLOUDY. LOWS IN THE MID 20S. HIGHS IN THE MID
30S. WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS IN THE
UPPER 20S. HIGHS IN THE MID 30S. WINDS GENERALLY LESS THAN
10 MPH.

$$

FORECASTER...LIPSON
REQUESTED BY...SAGE DECKER
REASON FOR REQUEST...PRESCRIBED
.TAG 20100209.SANDD.02/RIW