FNUS75 KRIW 191139
FWSRIW

SPOT FORECAST FOR DITCH CREEK...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
539 AM MDT SAT SEP 19 2009

FORECAST IS BASED ON REQUEST TIME OF 1830 MDT ON SEPTEMBER 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
WARMER THAN NORMAL TEMPERATURES WILL CONTINUE OVER THE FIRE
TODAY WITH LOW MINIMUM RELATIVE HUMIDITIES.  ISOLATED SHOWERS AND
THUNDERSTORMS THIS AFTERNOON AND EVENING WILL PRODUCE STRONG OUTFLOW
WINDS.  AN APPROACHING COLD FRONT WILL KEEP ISOLATED SHOWERS AND
THUNDERSTORMS IN THE AREA THIS EVENING AND COLDER...UNSTABLE AIR
BEHIND THE FRONT WILL ALLOW SCATTERED SHOWERS AND THUNDERSTORMS TO
CONTINUE THROUGH SUNDAY.

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

FORECASTER...C.BAKER

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (40-50 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 73.
MIN HUMIDITY........20-23 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST
                    AROUND 10 MPH LATE IN THE AFTERNOON. GUSTY AND
                    ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN
                    THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 5 TO 10 MPH INCREASING TO AROUND 15
                    MPH LATE IN THE AFTERNOON.
LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.10 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......5200 FT AGL INCREASING TO 9400 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 8 TO 16 MPH.
SMOKE DISPERSAL.....POOR (35200 KNOT-FT) INCREASING TO VERY GOOD
                    (117300 KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT). ISOLATED
                    THUNDERSTORMS IN THE EVENING. SLIGHT CHANCE OF
                    RAIN SHOWERS THROUGH THE NIGHT. SLIGHT CHANCE
                    OF THUNDERSTORMS AFTER MIDNIGHT.
MIN TEMPERATURE.....45-48.
MAX HUMIDITY........74-77 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 7 TO 9 MPH WITH GUSTS TO AROUND
                    15 MPH UNTIL EARLY MORNING BECOMING
                    DOWNSLOPE/DOWNVALLEY 4-7 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    EVENING. GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS AFTER MIDNIGHT.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH.
LAL.................2.
CHC OF WETTING RAIN.10 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......3700 FT AGL DECREASING TO 1200 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.
SMOKE DISPERSAL.....BECOMING POOR  BY 10 PM MDT(12400-47400 KNOT-FT).

.SUNDAY...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT).  CHANCE OF
                    SHOWERS AND THUNDERSTORMS IN THE MORNING...THEN
                    SLIGHT CHANCE OF RAIN SHOWERS AND ISOLATED
                    THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....57-60.
MIN HUMIDITY........30-33 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING WEST AROUND
                    11 MPH WITH HIGHER GUSTS LATE IN THE AFTERNOON.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH.
LAL.................4 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.15 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4300-5300 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 9 TO 17 MPH.
SMOKE DISPERSAL.....BECOMING GOOD BY NOON(72500 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY NIGHT...COLDER. PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS
IN THE EVENING. LOWS IN THE LOWER 30S. NORTHWEST WINDS AROUND
10 MPH.
.MONDAY...MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE LOWER
50S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...WARMER. MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN
THE MID 60S. WINDS GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE
UPPER 60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...C.BAKER
REQUESTED BY...LYNCH
REASON FOR REQUEST...WILDFIRE
.TAG 20090918.DITCH.01/RIW