FNUS75 KRIW 071844
FWSRIW

SPOT FORECAST FOR HOBACK PILE BURN...BLM RSD
NATIONAL WEATHER SERVICE RIVERTON WY
1144 AM MST WED DEC 7 2011

FORECAST IS BASED ON IGNITION TIME OF 1105 MST ON DECEMBER 07.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A TROUGH AND ASSOCIATED BACKDOOR COLD FRONT WILL MAINLY AFFECT
AREAS EAST OF THE CONTINENTAL DIVIDE TONIGHT AND THURSDAY MORNING WITH ONLY
SPOTTY LIGHT SNOW EXPECTED AFTER MIDNIGHT TONIGHT. OTHERWISE EXPECT DRY BENIGN
WEATHER WITH MAINLY POOR SMOKE DISPERSAL THROUGH THE WEEKEND. SMOKE DISPERSAL
WILL LIKELY IMPROVE TO FAIR FRIDAY AS THE AFOREMENTIONED TROUGH STIRS UP THE
ATMOSPHERE A LITTLE.

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

FORECASTER...LIPSON

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT). SLIGHT CHANCE OF
                    SNOW AFTER MIDNIGHT.
MIN TEMPERATURE.....ZERO TO 3 ABOVE ZERO.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....NORTHWEST AROUND 10 MPH.
MIXING HEIGHT.......300 FT AGL.
TRANSPORT WINDS.....NORTH 9 TO 17 MPH.
SMOKE DISPERSAL.....POOR (1700-4000 KNOT-FT).

.THURSDAY...
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT).
MAX TEMPERATURE.....21-24.
20 FOOT WINDS.......LIGHT AND VARIABLE 5-9 MPH.
RIDGE TOP WINDS.....NORTHWEST 10 TO 15 MPH.
MIXING HEIGHT.......800-1800 FT AGL.
TRANSPORT WINDS.....NORTHWEST 10 TO 18 MPH INCREASING TO 23 TO 25
                    MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR TO FAIR (13800-42800 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...PARTLY CLOUDY. LOWS AROUND 5 BELOW. WINDS
GENERALLY LESS THAN 10 MPH. POOR SMOKE DISPERSAL.
.FRIDAY...MOSTLY CLEAR. LOWS AROUND 1 BELOW. HIGHS IN THE LOWER
20S. WINDS GENERALLY LESS THAN 10 MPH. POOR SMOKE DISPERSAL.
.SATURDAY...MOSTLY CLEAR. LOWS NEAR ZERO. HIGHS IN THE MID 20S.
WINDS GENERALLY LESS THAN 10 MPH. POOR SMOKE DISPERSAL.
.SUNDAY...PARTLY CLOUDY. LOWS AROUND 1. HIGHS IN THE MID 20S.
WINDS GENERALLY LESS THAN 10 MPH. POOR SMOKE DISPERSAL.

$$

FORECASTER...LIPSON
REQUESTED BY...GREG RESER
REASON FOR REQUEST...PRESCRIBED
.TAG 20111207.HOBAC.01/RIW