FNUS75 KRIW 121640
FWSRIW

SPOT FORECAST FOR LITTLE BROWN...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
1040 AM MDT SAT SEP 12 2009

FORECAST IS BASED ON INCIDENT TIME OF 0841 MDT ON SEPTEMBER 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...AN UPPER LOW WILL CONTINUE TO RETROGRADE FROM OVER SOUTH
DAKOTA INTO CENTRAL WYOMING TODAY.  NORTHEAST WINDS WILL RESULT TODAY. A FEW
MORE CLOUDS WILL BE AROUND TODAY. THE UPPER LOW WILL LIFT NORTH TONIGHT
AND SUNDAY WITH THE FLOW BACKING TO THE SOUTHWEST...WITH SOME GUSTY
WINDS POSSIBLE.  SOME SUBTROPICAL MOISTURE WILL MOVE IN WITH CLOUD
COVER ON THE INCREASE FOR SUNDAY AS WELL AS THE CHANCE OF SHOWERS
AND POSSIBLY THUNDERSTORMS.  ANOTHER UPPER LOW WILL SPIN-UP OVER THE
GREAT BASIN MAKING CONDITIONS MORE FAVORABLE FOR SHOWERS AND
THUNDERSTORMS TO DEVELOP MONDAY AND TUESDAY.

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

FORECASTER...LIPSON

.TODAY...
SKY/WEATHER.........SUNNY (5-15 PERCENT) THEN CLOUDS MOVING IN FROM THE
                    EAST AND BECOMING PARTLY CLOUDY (55-65 PERCENT) DURING
                    THE AFTERNOON.
MAX TEMPERATURE.....62-64.
MIN HUMIDITY........29-31 PERCENT.
20 FOOT WINDS.......WINDS NORTHWEST 4 TO 11 MPH BECOMING NORTHEAST 5-9 MPH BY
                    1200.
RIDGE TOP WINDS.....EAST 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1400 FT AGL INCREASING TO 5700 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHEAST 14 TO 16 MPH.
SMOKE DISPERSAL.....POOR (17300 KNOT-FT) INCREASING TO GOOD (74100
                    KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT). ISOLATED
                    THUNDERSTORMS IN THE EVENING. ISOLATED RAIN
                    SHOWERS THROUGH THE NIGHT. ISOLATED SNOW
                    SHOWERS AFTER MIDNIGHT.
MIN TEMPERATURE.....36-38.
MAX HUMIDITY........73-76 PERCENT.
20 FOOT WINDS.......NORTHEAST 10 TO 15 MPH DECREASING TO 4-7 MPH AFTER
                    MIDNIGHT.
RIDGE TOP WINDS.....EAST 10 TO 15 MPH.
LAL.................2 UNTIL 2400...THEN 1.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2800 FT AGL DECREASING TO 600 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....EAST 14 TO 16 MPH.
SMOKE DISPERSAL.....POOR TO FAIR (5100-45900 KNOT-FT).

.SUNDAY...
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (65-75 PERCENT). SLIGHT CHANCE OF
                    RAIN SHOWERS AND ISOLATED THUNDERSTORMS IN THE
                    AFTERNOON.
MAX TEMPERATURE.....68 TO 70.
MIN HUMIDITY........26-29 PERCENT.
20 FOOT WINDS.......SOUTHWEST 5-9 MPH BECOMING INCREASING TO 10 TO 15 MPH
                    BY 0900...THEN INCREASING TO 13 TO 23 MPH BY
                    1500.
RIDGE TOP WINDS.....SOUTH AROUND 15 MPH INCREASING TO SOUTHWEST
                    AROUND 25 MPH LATE IN THE AFTERNOON.
LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......1800 FT AGL INCREASING TO 5000 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH INCREASING TO AROUND 25
                    MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (22000 KNOT-FT) INCREASING TO VERY GOOD
                    (115700 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY NIGHT...MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS IN THE EVENING...THEN SLIGHT CHANCE OF
SHOWERS AFTER MIDNIGHT. LOWS IN THE LOWER 40S. SOUTHWEST WINDS
AROUND 12 MPH.
.MONDAY...MOSTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER
60S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.
.WEDNESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...LIPSON
REQUESTED BY...R  LANCASTER
REASON FOR REQUEST...WFU
.TAG 20090912.LITTL.01/RIW