FNUS75 KRIW 101742
FWSRIW

SPOT FORECAST FOR DITCH CREEK...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
1142 AM MDT THU SEP 10 2009

FORECAST IS BASED ON REQUEST TIME OF 1103 MDT ON SEPTEMBER 10.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A DRY AFTERNOON FOR THE FIRE AREA. BREEZY WESTERLY WINDS WILL
TURN AND BECOME NORTHERLY LATE TONIGHT AS A COLD FRONT MAKES ITS
WAY ACROSS THE WESTERN MOUNTAINS. LIGHTER WINDS CAN BE EXPECTED
FOR FRIDAY ALONG WITH COOLER TEMPERATURES AND THEREFORE HIGHER
MINIMUM RH READINGS.



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

FORECASTER...BERC

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....69-72.
MIN HUMIDITY........19-22 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING WEST AT
                    11-14 MPH BY 1600.
RIDGE TOP WINDS.....SOUTH AROUND 10 MPH SHIFTING TO THE EAST LATE
                    IN THE MORNING...THEN SHIFTING TO THE WEST 10
                    TO 15 MPH AROUND 1600.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......3500 FT AGL INCREASING TO 8800 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTH AROUND 8 MPH SHIFTING TO THE EAST AROUND
                    7 MPH LATE IN THE MORNING...THEN SHIFTING TO
                    THE WEST 10 TO 16 MPH BY 1400.
SMOKE DISPERSAL.....POOR (16700 KNOT-FT) INCREASING TO GOOD (97200
                    KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
MIN TEMPERATURE.....36-39.
MAX HUMIDITY........53-56 PERCENT.
20 FOOT WINDS.......NORTHWEST WINDS AROUND 9 MPH WITH GUSTS TO
                    AROUND 15 MPH EARLY IN THE EVENING BECOMING
                    DOWNSLOPE/DOWNVALLEY 4-7 MPH BY 2300.
RIDGE TOP WINDS.....NORTHWEST AROUND 15 MPH SHIFTING TO THE
                    SOUTHWEST AROUND 2000...THEN SHIFTING
                    TO THE NORTH AFTER MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4700 FT AGL DECREASING TO 900 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTHWEST AROUND 14 MPH SHIFTING TO THE
                    SOUTHWEST AROUND 8 MPH BY 2000
                    ...THEN SHIFTING TO THE NORTH 9 TO 10
                    MPH AFTER MIDNIGHT.
SMOKE DISPERSAL.....POOR (7300-39400 KNOT-FT).

.FRIDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....65-68.
MIN HUMIDITY........21-24 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....NORTHEAST 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.......3200 FT AGL INCREASING TO 5500 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHEAST 8 TO 9 MPH.
SMOKE DISPERSAL.....POOR TO FAIR (22600-41900 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...CLEAR. LOWS IN THE LOWER 40S. WINDS GENERALLY
LESS THAN 10 MPH.
.SATURDAY...COOLER. MOSTLY CLEAR. LOWS IN THE LOWER 30S. HIGHS IN
THE MID 50S. WINDS GENERALLY LESS THAN 10 MPH.
.SUNDAY...PARTLY CLOUDY. LOWS IN THE LOWER 40S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.
.MONDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...BERC
REQUESTED BY...CHRIS VERO
REASON FOR REQUEST...WILDFIRE
.TAG 20090910.DITCH.01/RIW