FNUS75 KRIW 230345
FWSRIW

SPOT FORECAST FOR BUTTON...BLM WOD
NATIONAL WEATHER SERVICE RIVERTON WY
945 PM MDT MON AUG 22 2011

FORECAST IS BASED ON REQUEST TIME OF 2058 MDT ON AUGUST 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...DRY WEATHER OVERNIGHT THROUGH TUESDAY NIGHT. THE MAIN
ISSUE WILL BE INCREASING WIND SPEEDS TUESDAY AFTERNOON COMBINED WITH
HOT TEMPERATURES AND VERY LOW AFTERNOON HUMIDITY. FIRE BEHAVIOR
COULD BE EXTREME DURING THE MID AFTERNOON INTO THE EARLY EVENING.
A WIND SHIFT TO THE NORTH NORTHWEST IS FORECAST BETWEEN 1800 AND 2000
TUESDAY EVENING. THIS WILL USHER IN COOLER AIR AND SLIGHTLY HIGHER
RELATIVE HUMIDITY. WEDNESDAY LOOKS DRY WITH LIGHT WIND FROM THE SOUTH
SOUTHEAST AT 5 TO 10 MPH IN THE AFTERNOON.

PLEASE MONITOR WIND SPEEDS AND DIRECTION TUESDAY AND PLEASE SEND
OBSERVATION FEEDBACK TO THE NATIONAL WEATHER SERVICE.

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

FORECASTER...AR

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY.
MIN TEMPERATURE.....58-63.
MAX HUMIDITY........32-37 PERCENT.

20 FOOT WINDS.......WEST TO SOUTHWEST AT 5 TO 9 MPH UNTIL MIDNIGHT...
                    THEN WEST TO SOUTHWEST AT 4 TO 7 MPH...BECOMING
                    VARIABLE AT 3 TO 5 MPH AFTER 400 AM.

RIDGE TOP WINDS.....WEST TO SOUTHWEST AT 6 TO 10 MPH UNTIL MIDNIGHT...
                    THEN WEST TO SOUTHWEST AT 4 TO 7 MPH.

LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO 200-400 FT AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST AROUND 10 MPH.
SMOKE DISPERSAL.....DECREASING TO POOR BY AFTER MIDNIGHT.

.TUESDAY...
SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....90-95.
MIN HUMIDITY........9-14 PERCENT.

20 FOOT WINDS.......VARIABLE AT 3 TO 5 MPH UNTIL 1300...THEN BECOMING
                    WEST TO NORTHWEST AT 8 TO 13 MPH AFTER 1300...GUSTS
                    TO 20 MPH.

RIDGE TOP WINDS.....WEST AT 4 TO 8 MPH UNTIL 1300...THEN WEST TO NORTHWEST
                    AT 15 TO 20 MPH AFTER 1300 WITH GUSTS AROUND 25 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 12000-14000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 25 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....INCREASING TO EXCELLENT AFTER 1300.

.FORECAST DAYS 3 THROUGH 5...

.TUESDAY NIGHT...CLEAR. LOWS IN THE MID 50S. MAX RH...40-45 PERCENT.
NORTH TO NORTHWEST WIND 10 TO 15 MPH UNTIL 2200...THEN DECREASING TO
4 TO 7 MPH AFTER MIDNIGHT.

.WEDNESDAY...MOSTLY SUNNY. HIGHS 85 TO 90. AFTERNOON SOUTH TO SOUTHEAST
WIND AT 5 TO 10 MPH.

.THURSDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 60S. HIGHS IN THE UPPER 80S.
WINDS GENERALLY LESS THAN 10 MPH.

.FRIDAY...PARTLY CLOUDY. LOWS AROUND 60. HIGHS IN THE MID 80S.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...ROSS
REQUESTED BY...STEVE WILLIAMSON
REASON FOR REQUEST...WILDFIRE
.TAG 20110822.BUTTO.01/RIW