FNUS75 KRIW 041550
FWSRIW

SPOT FORECAST FOR LITTLE BROWN...IA TDC
NATIONAL WEATHER SERVICE RIVERTON WY
950 AM MDT FRI SEP 4 2009

FORECAST IS BASED ON REQUEST TIME OF 0907 MDT ON SEPTEMBER 04.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A RIDGE OF HIGH PRESSURE WILL REMAIN ACROSS THE AREA THROUGH SATURDAY
AHEAD OF AN INCOMING LOW PRESSURE SYSTEM. ISOLATED AFTERNOON AND EARLY
EVENING THUNDERSTORMS ARE EXPECTED...BUT FOR THE MOST PART CONDITIONS
WILL BE DRY THROUGH SATURDAY NIGHT. TEMPERATURES WILL REMAIN MUCH THE
SAME THROUGH SUNDAY. HOWEVER...SOUTHWEST WIND WILL INCREASE SUNDAY
AHEAD OF A COLD FRONT WHICH WILL SWING THROUGH SUNDAY EVENING. EXPECT
DRYING AND COOLER CONDITIONS ON LABOR DAY.

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

FORECASTER...JONES

.TODAY...
SKY/WEATHER.........SUNNY UNTIL 1100...THEN BECOMING PARTLY CLOUDY
                    (40-50 PERCENT) BY 1400. ISOLATED SHOWERS AND
                    THUNDERSTORMS AFTER 1400.
MAX TEMPERATURE.....76-79.
MIN HUMIDITY........15-18 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 2 TO 5 MPH UNTIL 1030...
                    THEN BECOMING UPSLOPE/UPVALLEY 7 TO 12 MPH BY 1200.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR AFTERNOON
                    THUNDERSTORMS.
RIDGE TOP WINDS.....NORTHWEST 5 TO 10 MPH.
LAL.................1 UNTIL 1400...THEN LAL 2.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 10500 FT AGL BY 1400.
TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
SMOKE DISPERSAL.....BECOMING GOOD BY 1400.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) WITH ISOLATED
                    SHOWERS AND THUNDERSTORMS UNTIL 2000...THEN
                    PARTLY CLOUDY (30-40 PERCENT).
MIN TEMPERATURE.....36-39.
MAX HUMIDITY........68-71 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5 TO 10 MPH UNTIL 1900...THEN
                    BECOMING DOWNSLOPE/DOWNVALLEY 2-6 MPH BY 2200.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    EARLY EVENING THUNDERSTORMS.
RIDGE TOP WINDS.....WEST AROUND 10 MPH SHIFTING TO THE SOUTHWEST AFTER
                    MIDNIGHT.
LAL.................2 UNTIL 2000...THEN LAL 1.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......GRADUALLY DECREASING TO LESS THAN 500 FT AGL
                    BY 2200.
TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH UNTIL 1900...THEN BECOMING
                    DOWNSLOPE/DOWNVALLEY 3 TO 6 MPH BY 2200.
SMOKE DISPERSAL.....BECOMING POOR BY 2100.

.SATURDAY...
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) UNTIL 1400...THEN
                    PARTLY CLOUDY (50 PERCENT) WITH ISOLATED SHOWERS
                    AND THUNDERSTORMS.
MAX TEMPERATURE.....73-76.
MIN HUMIDITY........18-21 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 2 TO 5 MPH UNTIL 1000...THEN
                    BECOMING UPSLOPE/UPVALLEY 7 TO 12 MPH. GUSTY AND
                    ERRATIC WINDS EXPECTED NEAR AFTERNOON
                    THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH.
LAL.................1 UNTIL 1400...THEN LAL 2.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......LESS THAN 500 FT AGL UNTIL 0900...THEN RISING TO
                    10500 FT AGL BY 1400.
TRANSPORT WINDS.....DOWNSLOPE/DOWNVALLEY AROUND 5 MPH UNTIL 0900...THEN
                    SOUTH 8 TO 12 MPH BY 1200.
SMOKE DISPERSAL.....POOR UNTIL 1000...THEN INCREASING TO VERY GOOD
                    BY 1400.

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...PARTLY CLOUDY WITH ISOLATED RAIN SHOWERS. ISOLATED
EVENING THUNDERSTORMS POSSIBLE. LOWS 40 TO 45. WINDS GENERALLY LESS
THAN 10 MPH.
.SUNDAY...PARTLY CLOUDY WITH SCATTERED SHOWERS AND THUNDERSTORMS.
LOWS IN THE MID 40S. HIGHS IN THE LOWER 70S. WINDS SOUTHWEST 10 TO 20
MPH WITH POSSIBLE HIGHER GUSTS. BECOMING DRIER LATE SUNDAY NIGHT
FOLLOWING FRONTAL PASSAGE.
.LABOR DAY...PARTLY CLOUDY WITH ISOLATED LATE AFTERNOON AND EVENING
SHOWERS AND THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS 61 TO 66.
WINDS WESTERLY AT 10 TO 15 MPH.
.TUESDAY...PARTLY CLOUDY. LOWS IN THE UPPER 30S. HIGHS IN THE
MID 60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...JONES
REQUESTED BY...LANCASTER
REASON FOR REQUEST...WILDFIRE
.TAG 20090904.LITTL.01/RIW