FNUS75 KRIW 231811
FWSRIW

SPOT FORECAST FOR SAWMILL...FREMONT COUNTY FIRE
NATIONAL WEATHER SERVICE RIVERTON WY
1211 PM MDT THU JUL 23 2009

FORECAST IS BASED ON REQUEST TIME OF 1146 MDT ON JULY 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
UPSLOPE/SOUTHEAST WIND IS EXPECTED IN THE FIRE AREA THIS AFTERNOON.
SCATTERED CUMULUS WILL CONTINUE TO DEVELOP THROUGHOUT THE
AFTERNOON WITH AN ISOLATED THUNDERSTORM OR TWO POSSIBLE THIS AFTERNOON
AND EVENING. GUSTY OUTFLOW WIND WILL BE THE MAIN IMPACT FROM ANY
STORM THAT DEVELOPS NEAR THE FIRE. A WEAK WEATHER SYSTEM IS
EXPECTED TO MOVE THROUGH NORTHERN WYOMING TONIGHT...KEEPING PARTLY
CLOUDY TO MOSTLY CLOUDY SKY OVER THE AREA THROUGH THE NIGHT. A
SLIGHTLY BETTER CHANCE FOR ISOLATED THUNDERSTORMS IS POSSIBLE
FRIDAY AFTERNOON AS MID LEVEL MOISTURE BEGINS TO INCREASE OVER
CENTRAL WYOMING.

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

FORECASTER...CHURCH

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (35-45 PERCENT). A SLIGHT CHANCE FOR
                    ISOLATED THUNDERSTORMS.
MAX TEMPERATURE.....84-87.
MIN HUMIDITY........15-18 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 3-7 MPH BECOMING WEST
                    AROUND 10 MPH LATE IN THE AFTERNOON.
                    GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....WEST AROUND 10 MPH SHIFTING TO THE
                    NORTHEAST EARLY IN THE AFTERNOON.
LAL.................2.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......6600 FT AGL INCREASING TO 12600 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....WEST AROUND 10 MPH EARLY IN THE EARLY AFTERNOON
                    BECOMING BECOMING LIGHT AND VARIABLE.
SMOKE DISPERSAL.....FAIR (45200-58200 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT). A SLIGHT CHANCE FOR ISOLATED
                    THUNDERSTORMS IN THE EVENING.
MIN TEMPERATURE.....AROUND 60.
MAX HUMIDITY........45-48 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....NORTHWEST 10 TO 15 MPH SHIFTING TO THE WEST 5
                    TO 10 MPH AFTER MIDNIGHT.
LAL.................2 UNTIL 2300 THEN 1.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......6500 FT AGL DECREASING TO 400 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....LIGHT AND VARIABLE WINDS BECOMING NORTHWEST
                    AROUND 10 MPH AFTER MIDNIGHT.
SMOKE DISPERSAL.....POOR (3300-9400 KNOT-FT).

.FRIDAY...
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (40-50 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....82-85.
MIN HUMIDITY........22-25 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 4-8 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....NORTHEAST 10 TO 15 MPH.
LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5400 FT AGL INCREASING TO 10300 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHEAST AROUND 9 MPH SHIFTING TO THE WEST IN
                    THE LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....VERY GOOD (123300 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 50S. WINDS GENERALLY LESS THAN
10 MPH.
.SATURDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE LOWER 80S. WINDS
GENERALLY LESS THAN 10 MPH.
.SUNDAY...PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE LOWER 50S. HIGHS IN THE LOWER 80S. WINDS GENERALLY
LESS THAN 10 MPH.
.MONDAY...MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE LOWER 50S. HIGHS IN THE MID 70S. WINDS GENERALLY LESS
THAN 10 MPH.

$$

FORECASTER...CHURCH
REQUESTED BY...ROCKY MCWILLIAMS
REASON FOR REQUEST...WILDFIRE
.TAG 20090723.SAWMI.01/RIW