FNUS75 KRIW 121752
FWSRIW

SPOT FORECAST FOR BASIN...BLM RSD
NATIONAL WEATHER SERVICE RIVERTON WY
1152 AM MDT WED AUG 12 2009

FORECAST IS BASED ON REQUEST TIME OF 1126 MDT ON AUGUST 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
HIGH PRESSURE WILL REMAIN OVER THE FIRE THROUGH THE OVERNIGHT
HOURS. THIS WILL ALLOW TEMPERATURES TO CONTINUE TO WARM TODAY WITH
A FURTHER DECREASE IN DAYTIME HUMIDITIES. A SOUTHWEST WIND OF 10
TO 15 MPH WILL REMAIN OVER THE AREA AS WELL. FOR THURSDAY...AN
APPROACHING DISTURBANCE WILL BRING ISOLATED SHOWERS AND
THUNDERSTORMS OVER THE FIRE BY THE AFTERNOON HOURS...WITH
INCREASED SOUTHWEST WIND EXPECTED BY THE LATE AFTERNOON. DAYTIME
TEMPERATURES WILL BE SLIGHTLY COOLER THURSDAY AFTERNOON WITH A
SLIGHT INCREASE IN DAYTIME HUMIDITY. THE NEXT POTENTIALLY STRONGER
SYSTEM WILL MOVE OVER THE FIRE FRIDAY AFTERNOON...BRINGING
SCATTERED SHOWERS AND THUNDERSTORMS AND COOLER TEMPERATURES.


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

FORECASTER...BRANHAM

.TODAY...
SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....85-88.
MIN HUMIDITY........9-12 PERCENT.
20 FOOT WINDS.......SOUTHWEST AROUND 5 MPH BECOMING 6 TO 10 MPH
                    BY 1300.
RIDGE TOP WINDS.....SOUTHWEST 12 TO 17 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 15800 FT AGL BY 1400.
TRANSPORT WINDS.....WEST SOUTHWEST AT 12 TO 17 MPH.
SMOKE DISPERSAL.....INCREASING TO EXCELLENT (196100 KNOT-FT) BY 1400.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....51-56.
MAX HUMIDITY........39-42 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH BECOMING
                    DOWNSLOPE/DOWNVALLEY 5-9 MPH BY 0200.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........INCREASING TO 6 OR HIGH POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH BY 1900.
MIXING HEIGHT.......DECREASING TO 1400 FT AGL BY 0200.
TRANSPORT WINDS.....SOUTHWEST 10 TO 17 MPH.
SMOKE DISPERSAL.....DECREASING TO POOR (12400 KNOT-FT) BY 0200.

.THURSDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (35-45 PERCENT) BY 1100. ISOLATED
                    SHOWERS AND THUNDERSTORMS AFTER 1200.
MAX TEMPERATURE.....83-87.
MIN HUMIDITY........12-16 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST
                    AROUND 10 MPH AFTER 1400. GUSTY AND
                    ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN
                    THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 18 MPH.
LAL.................1 UNTIL 1200...THEN 2.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT AFTER 1200.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 16900 FT AGL BY 1300.
TRANSPORT WINDS.....SOUTH SOUTHWEST 6 TO 13 MPH.
SMOKE DISPERSAL.....INCREASING TO EXCELLENT (154400 KNOT-FT) BY
                    1400.

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...PARTLY CLOUDY. ISOLATED THUNDERSTORMS IN THE
EVENING. LOWS IN THE MID 50S. SOUTHWEST WINDS AROUND 11 MPH.
.FRIDAY...PARTLY CLOUDY WITH SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS IN THE LOWER 50S. HIGHS AROUND 80. SOUTHWEST
WINDS AROUND 12 MPH.
.SATURDAY...MOSTLY CLOUDY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE MID 70S. WINDS
GENERALLY LESS THAN 10 MPH.
.SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER 60S. WINDS
GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...BRANHAM
REQUESTED BY...FS441
REASON FOR REQUEST...WILDFIRE
.TAG 20090812.BASIN.01/RIW