FNUS75 KRIW 201552
FWSRIW

SPOT FORECAST FOR SAND DRAW...BLM WOD
NATIONAL WEATHER SERVICE RIVERTON WY
852 AM MST TUE JAN 20 2009

FORECAST IS BASED ON IGNITION TIME OF 1100 MST ON JANUARY 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A RIDGE OF HIGH PRESSURE ACROSS THE REGION WILL RESULT IN DRY AND
UNSEASONABLY WARM TEMPERATURES TODAY AND WEDNESDAY. IN
ADDITION...WINDS WILL BE LIGHT AND TERRAIN INFLUENCED. DRY
RELATIVE HUMIDITY IS EXPECTED TODAY WITH LEIGH CREEK ALREADY ONLY
6 PERCENT AND HYATT HIGH AT 25 PERCENT. FORECASTED MIN RH OF
10-15 PERCENT AT THE FIRE SITE TODAY...BECAUSE OF THE ELEVATION
DIFFERENCE BETWEEN LEIGH CREEK AND FIRE SITE...WHICH IS ABOUT 2000
FEET...WHICH SHOULD MAKE THE FIRE SITE HAVE A BIT HIGHER RH.

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

FORECASTER...MURRELL

.TODAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....AROUND 50.
MIN HUMIDITY........10-15 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 3-7 MPH.
RIDGE TOP WINDS.....WEST NORTHWEST 5 TO 10 MPH
MIXING HEIGHT.......1500 FEET.
TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH
SMOKE DISPERSAL.....POOR.

.TONIGHT...
SKY/WEATHER.........CLEAR (0-10 PERCENT).
MIN TEMPERATURE.....28-34.
MAX HUMIDITY........50-55 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 2-4 MPH.
RIDGE TOP WINDS.....LIGHT NORTHWEST
MIXING HEIGHT.......300 FEET.
TRANSPORT WINDS.....LIGHT NORTHWEST
SMOKE DISPERSAL.....POOR.

.WEDNESDAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....53-56.
MIN HUMIDITY........10-15 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....WEST NORTHWEST 5 TO 10 MPH.
MIXING HEIGHT.......1500 FEET.
TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
SMOKE DISPERSAL.....POOR.

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 30S. WINDS
GENERALLY LESS THAN 10 MPH.
.THURSDAY...COLDER. MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS IN
THE LOWER 20S. HIGHS IN THE LOWER 40S. WINDS GENERALLY LESS THAN
10 MPH.
.FRIDAY...COLDER. MOSTLY CLOUDY WITH SLIGHT CHANCE OF SNOW. LOWS
AROUND 18. HIGHS IN THE MID 20S. WINDS GENERALLY LESS THAN
10 MPH.
.SATURDAY...MOSTLY CLOUDY WITH SLIGHT CHANCE OF SNOW. LOWS AROUND
16. HIGHS IN THE UPPER 20S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MURRELL
REQUESTED BY...ANDY ROTHLEUTNERT
REASON FOR REQUEST...PRESCRIBED
.TAG 20090120.SANDD.01/RIW