FNUS75 KRIW 211918
FWSRIW

SPOT FORECAST FOR BRADLEY MOUNTAIN...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
118 PM MDT MON SEP 21 2009

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON SEPTEMBER 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...COLD NORTHERLY FLOW ALOFT WILL PRODUCE AN UNSEASONABLY COOL
DAY WITH HIGH TEMPERATURES 8-12 F BELOW NORMAL. SURFACE HIGH PRESSURE WILL
MOVE ACROSS THE REGION TONIGHT WITH LIGHT...TERRAIN DRIVEN WINDS AND
SOME RELATIVE HUMIDITY RECOVERIES AT THE LOWER ELEVATIONS.
MILDER...BUT STILL BELOW NORMAL...DAYTIME TEMPERATURES WILL PREVAIL TUESDAY
...AS UPPER LEVEL HIGH PRESSURE BUILDS IN SLOWLY FROM THE WEST.

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

FORECASTER...LIPSON

.TODAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....62 AT 5600 FEET AND 46 AT 8900 FEET.
MIN HUMIDITY........14 PERCENT AT 5600 FEET AND 25 PERCENT AT 8900 FEET.
20 FOOT WINDS.......SOUTHWEST WINDS 5-9 MPH. WINDS WILL GUST OCCASIONALLY
                    FROM THE NORTHWEST AT 5 TO 10 MPH WITH SOME GUSTS TO 20 MPH
                    WITH NORTHWESTERLY GUSTS GRADUALLY BECOMING MORE FREQUENT
                    DURING THE AFTERNOON. WINDS WILL BE
                    EAST NORTHEAST ABOVE 7500 FEET ALONG THE SNAKE RIVER
                    DRAINAGE AT 5 TO 9 MPH MOST OF THE DAY.
RIDGE TOP WINDS.....NORTH 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5700-6700 FT AGL.
TRANSPORT WINDS.....NORTH 12 TO 18 MPH.
SMOKE DISPERSAL.....FAIR TO GOOD (58800-86500 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....34-37 IN THE THERMAL BELT BETWEEN 7000 AND 8000 FEET.
                    OTHERWISE LOWS 27 TO 30.
MAX HUMIDITY........45-47 PERCENT IN THE THERMAL BELT BETWEEN 7000 AND 8000
                    FEET. OTHERWISE 60 TO 67 PERCENT..
20 FOOT WINDS.......NORTHWEST WINDS 8 TO 9 MPH WITH GUSTS TO AROUND 15
                    MPH IN THE EVENING BECOMING
                    DOWNSLOPE/DOWNVALLEY 4-7 MPH EXCEPT PREVAILING NORTH WINDS
                    LIKELY BECOMING CHANNELED FROM THE WEST
                    AT THE MOUTH OF THE GREYS RIVER.
RIDGE TOP WINDS.....NORTHEAST 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3300 FT AGL DECREASING TO 500 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTHEAST 14 TO 18 MPH.
SMOKE DISPERSAL.....POOR TO FAIR (6300-48100 KNOT-FT).

.TUESDAY...
SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....71 AT 5600 FEET AND 55 AT 8900 FEET.
MIN HUMIDITY........17 PERCENT AT 5600 FEET AND 30 PERCENT AT 8900 FEET.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BELOW 7500 FEET.
                    ABOVE 7500 FEET WINDS SOUTHWEST 4 TO 8 MPH WITH OCCASIONAL
                    GUSTS FROM THE NORTHWEST AT THE SAME SPEEDS. WINDS EAST
                    NORTHEAST 4 TO 8 MPH ALONG THE GREYS RIVER ABOVE 7500 FEET.
RIDGE TOP WINDS.....NORTHEAST 10 TO 15 MPH SHIFTING TO THE
                    NORTHWEST IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2900 FT AGL INCREASING TO 6100 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHEAST 13 TO 15 MPH SHIFTING TO THE
                    NORTHWEST 14 TO 18 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (32500 KNOT-FT) INCREASING TO GOOD (84400
                    KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.TUESDAY NIGHT...CLEAR. LOWS AROUND 40. WINDS GENERALLY LESS THAN
10 MPH.
.WEDNESDAY...SMOKE DISPERSION WILL BE VERY GOOD.
MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 60S.
WINDS GENERALLY LESS THAN 10 MPH.
.THURSDAY...MIXING HEIGHTS WILL INCREASE BUT TRANSPORT WIND SPEEDS
WILL DECREASE RESULTING IN CONTINUED VERY GOOD SMOKE DISPERSAL.
MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER
60S. WINDS GENERALLY LESS THAN 10 MPH.
.FRIDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...LIPSON
REQUESTED BY...KIRK STROM
REASON FOR REQUEST...PRESCRIBED
.TAG 20090923.BRADL.03/RIW