FNUS75 KRIW 251629
FWSRIW

SPOT FORECAST FOR POLECAT BENCH...BLM CAD
NATIONAL WEATHER SERVICE RIVERTON WY
1029 AM MDT FRI SEP 25 2009

FORECAST IS BASED ON IGNITION TIME OF 1130 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...LIGHT...TERRAIN DRIVEN WINDS AND AFTERNOON
RELATIVE HUMIDITY IN THE LOWER TO MID TEENS. 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 25 MPH.
SATURDAY WILL ALSO BE DRY AND WARM.

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

FORECASTER...SMITH

.TODAY...
SKY/WEATHER.........SUNNY (5-10 PERCENT).
MAX TEMPERATURE.....79-82.
MIN HUMIDITY........11-14 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....NORTH 8-12 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......500 FT AGL INCREASING TO 7500 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST AROUND 15 MPH SHIFTING TO THE NORTH
                    AROUND 15 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (3000 KNOT-FT) INCREASING TO GOOD (78500
                    KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (5-10 PERCENT).
MIN TEMPERATURE.....49-52.
MAX HUMIDITY........55-58 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....NORTH AROUND 15 MPH...SHIFTING TO THE
                    SOUTH AFTER MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3500 FT AGL DECREASING TO 200 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTH AROUND 15 MPH...SHIFTING TO
                    THE SOUTH 10 TO 15 MPH AFTER MIDNIGHT.
SMOKE DISPERSAL.....POOR (1900-32800 KNOT-FT).

.SATURDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-15 PERCENT).
MAX TEMPERATURE.....81-84.
MIN HUMIDITY........11-14 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH...BECOMING WEST
                    10-15 MPH WITH GUSTS TO 25 MPH IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH...SHIFTING TO THE WEST
                    20 TO 25 MPH I THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......400 FT AGL INCREASING TO 6500 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 15 MPH...INCREASING TO AROUND 25 MPH
                    IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (5000 KNOT-FT) INCREASING TO GOOD (76700
                    KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...CLEAR. LOWS AROUND 50. WINDS GENERALLY LESS
THAN 10 MPH.
.SUNDAY...COOLER...CLEAR. LOWS AROUND 40. HIGHS IN THE UPPER 60S.
NORTHEAST WINDS AROUND 10 MPH.
.MONDAY...CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE UPPER 70S.
WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE MID 70S.
SOUTHWEST WINDS AROUND 10 MPH.

$$

FORECASTER...SMITH
REQUESTED BY...CODY DISPATCH
REASON FOR REQUEST...PRESCRIBED
.TAG 20090925.POLEC.01/RIW