FNUS75 KRIW 251330
FWSRIW

SPOT FORECAST FOR BRADLEY MOUNTAIN...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
730 AM MDT FRI SEP 25 2009

FORECAST IS BASED ON IGNITION TIME OF 0740 MDT ON SEPTEMBER 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

HIGH PRESSURE AT THE SURFACE AND ALOFT WILL PRODUCE ANOTHER DRY DAY WITH
ABOVE NORMAL TEMPERATURES...TERRAIN DRIVEN WINDS AND AFTERNOON
RELATIVE HUMIDITY IN THE LOWER 20S. A WEAK LOW PRESSURE SYSTEM
WILL MOVE ACROSS MONTANA SATURDAY. THIS SYSTEM WILL CAUSE WINDS TO
INCREASE SATURDAY AFTERNOON WITH WEST WIND GUSTING UP TO 30 MPH.

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

FORECASTER...SMITH

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....66-69.
MIN HUMIDITY........21-24 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....NORTHEAST 10 TO 15 MPH SHIFTING TO THE WEST IN
                    THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......500 FT AGL INCREASING TO 8500 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHEAST 15 TO 20 MPH SHIFTING TO THE WEST 10
                    TO 15 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (4700 KNOT-FT) INCREASING TO GOOD (94200
                    KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
MIN TEMPERATURE.....42-45.
MAX HUMIDITY........46-49 PERCENT.
20 FOOT WINDS.......NORTHWEST WINDS AROUND 10 MPH EARLY IN THE
                    EVENING BECOMING DOWNSLOPE/DOWNVALLEY 4-7
                    MPH.
RIDGE TOP WINDS.....NORTHWEST AROUND 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......5000 FT AGL DECREASING TO 500 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.
SMOKE DISPERSAL.....GOOD (67900 KNOT-FT) DECREASING TO POOR (2700
                    KNOT-FT) AFTER MIDNIGHT.

.SATURDAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....65-68.
MIN HUMIDITY........19-22 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH...BECOMING WEST
                    15-20 MPH WITH GUSTS TO AROUND 30 MPH
                    LATE IN THE AFTERNOON.
RIDGE TOP WINDS.....WEST 10 TO 15 MPH INCREASING TO AROUND 30 MPH
                    LATE 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.......500 FT AGL INCREASING TO 8500 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....WEST 20 TO 25 MPH.
SMOKE DISPERSAL.....POOR (5500 KNOT-FT) INCREASING TO VERY GOOD
                    (117600 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...CLEAR. LOWS IN THE LOWER 40S. WEST WINDS AROUND
12 MPH.
.SUNDAY...CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID 60S.
WINDS GENERALLY LESS THAN 10 MPH.
.MONDAY...CLEAR. LOWS IN THE MID 40S. HIGHS IN THE MID 60S. SOUTH
WINDS AROUND 10 MPH.
.TUESDAY...COOLER. PARTLY CLOUDY WITH CHANCE OF SHOWERS...
THUNDERSTORMS AND SNOW SHOWERS. LOWS IN THE LOWER 30S. HIGHS IN
THE LOWER 50S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...SMITH
REQUESTED BY...MACK
REASON FOR REQUEST...PRESCRIBED
.TAG 20090925.BRADL.01/RIW