FNUS75 KRIW 061519
FWSRIW

SPOT FORECAST FOR HOBACK PILE BURN...BLM RAD
NATIONAL WEATHER SERVICE RIVERTON WY
819 AM MST TUE DEC 6 2011

FORECAST IS BASED ON IGNITION TIME OF 0810 MST ON DECEMBER 06.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

DRY CONDITIONS EXPECTED OVER THE BURN SITE FOR THE NEXT COUPLE OF
DAYS. TEMPERATURES ARE EXPECTED TO WARM SLIGHTLY OVER THE NEXT
COUPLE OF DAYS...THOUGH OVERNIGHT LOWS WILL REMAIN COLD...RANGING
FROM JUST BELOW ZERO TO THE SINGLE DIGITS ABOVE ZERO. PERIODS OF
GUSTY WIND ARE EXPECTED TO REMAIN OVER THE BURN SITE
TODAY...THOUGH MIXING HEIGHTS ARE EXPECTED TO REMAIN LOW UNDER THE
STABLE AIR. THIS WILL RESULT IN CONTINUED POOR SMOKE DISPERSAL.
THIS PATTERN WILL CONTINUE THROUGH WEDNESDAY AFTERNOON. A WEAK
DISTURBANCE IS EXPECTED TO MOVE THROUGH THE BURN SITE WEDNESDAY
NIGHT INTO THURSDAY MORNING. THIS SYSTEM WILL INTRODUCE THE
POTENTIAL FOR LIGHT SNOWFALL. EVEN WITH THIS CHANGE IN
SYSTEMS...MIXING HEIGHTS ARE EXPECTED TO REMAIN LOW...RESULTING IN
POOR SMOKE DISPERSAL THROUGH THE MAJORITY OF THE WORK WEEK.

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

FORECASTER...BRANHAM

.TODAY...
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING
                    MOSTLY SUNNY (25-35 PERCENT) BY 1200.
MAX TEMPERATURE.....16-19.
20 FOOT WINDS.......NORTHWEST 12 TO 16 MPH WITH GUSTS TO AROUND
                    25 MPH POSSIBLE.
RIDGE TOP WINDS.....NORTHWEST 18 TO 22 MPH.
MIXING HEIGHT.......INCREASING TO AROUND 1100 FT AGL BY 1300.
TRANSPORT WINDS.....NORTHWEST 15 TO 20 MPH.
SMOKE DISPERSAL.....POOR (11000-20000 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).
MIN TEMPERATURE.....1 BELOW ZERO TO 2 ABOVE ZERO.
20 FOOT WINDS.......NORTHWEST WINDS 10 TO 15 MPH...BECOMING
                    DOWNSLOPE/DOWNVALLEY 4-7 MPH BY 0400.
                    GUSTS UP TO 25 MPH.
RIDGE TOP WINDS.....NORTHWEST 12 TO 18 MPH.
MIXING HEIGHT.......DECREASING TO AROUND 800 FT AGL BY 0300.
TRANSPORT WINDS.....NORTH 8 TO 12 MPH.
SMOKE DISPERSAL.....POOR (6100-9300 KNOT-FT).

.WEDNESDAY...
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (50-60 PERCENT) BY 1100.
MAX TEMPERATURE.....24-27.
20 FOOT WINDS.......NORTHWEST 5 TO 10 MPH.
RIDGE TOP WINDS.....NORTHWEST 10 TO 15 MPH.
MIXING HEIGHT.......INCREASING TO AROUND 1300 FT AGL BY 1300.
TRANSPORT WINDS.....NORTH 8 TO 12 MPH.
SMOKE DISPERSAL.....POOR (5900-9000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...MOSTLY CLOUDY WITH SLIGHT CHANCE OF SNOW. LOWS
AROUND 2. WINDS GENERALLY LESS THAN 10 MPH. SMOKE DISPERSAL POOR.

.THURSDAY...PARTLY CLOUDY. LOWS NEAR ZERO. HIGHS IN THE LOWER
20S. WINDS GENERALLY LESS THAN 10 MPH. SMOKE DISPERSAL POOR.

.FRIDAY...MOSTLY CLEAR. LOWS AROUND 1. HIGHS IN THE MID 20S.
WINDS GENERALLY LESS THAN 10 MPH. SMOKE DISPERSAL POOR.

.SATURDAY...MOSTLY CLEAR. LOWS AROUND 1. HIGHS IN THE MID 20S.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...BRANHAM
REQUESTED BY...GREG RESER
REASON FOR REQUEST...PRESCRIBED
.TAG 20111206.HOBAC.01/RIW