FNUS75 KRIW 200944
FWSRIW

SPOT FORECAST FOR UPPER BILLIES RX...BLM RSD
NATIONAL WEATHER SERVICE RIVERTON WY
344 AM MDT SUN MAY 20 2012

FORECAST IS BASED ON IGNITION TIME OF 2030 MDT ON MAY 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A MUCH WARMER AND DRIER AIRMASS WILL PUSH INTO THE
AREA TODAY AS A FLAT UPPER RIDGE BUILDS IN. THIS WARMING AND
DRYING TREND WILL CONTINUE ON MONDAY ALONG WITH INCREASING SOUTHWEST
WIND IN THE AFTERNOON. A PACIFIC COLD FRONT WILL PUSH ACROSS THE
AREA TUESDAY MORNING WITH SCATTERED RAIN AND SNOW SHOWERS...FOLLOWED BY
WINDY AND COOLER CONDITIONS THROUGH THE DAY.

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

FORECASTER...MEUNIER

.TODAY...
SKY/WEATHER.........MOSTLY CLEAR THROUGH 0900...THEN BECOMING PARTLY CLOUDY
                    (35-45 PERCENT).
MAX TEMPERATURE.....58-61.
MIN HUMIDITY........18-21 PERCENT.
20 FOOT WINDS.......UPSLOPE OR EAST SOUTHEAST 5-9 MPH BECOMING WEST SOUTHWEST
                    AROUND NOON WITH GUSTS OF 15 TO 20 MPH THROUGH THE AFTERNOON.
RIDGE TOP WINDS.....WEST 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.......AROUND 4000 FT AGL AT 0900...INCREASING TO 7000-8000 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....WEST SOUTHWEST 5 TO 10 MPH...THEN WEST 15 TO 20 MPH
                    LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....POOR THROUGH 0900...INCREASING TO VERY GOOD (112500 KNOT-FT)
                    IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (25-35 PERCENT).
MIN TEMPERATURE.....34-37.
MAX HUMIDITY........66-69 PERCENT.
20 FOOT WINDS.......WEST WINDS AROUND 10 MPH WITH GUSTS 15 TO 20 MPH UNTIL
                    AROUND SUNSET THEN BECOMING DOWNSLOPE/DOWNVALLEY OR NORTH
                    NORTHEAST 4-7 MPH.
RIDGE TOP WINDS.....WEST AROUND 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......5300-6300 FT AGL DECREASING TO 1400-2000 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST 10 TO 15 MPH.
SMOKE DISPERSAL.....GOOD (89000 KNOT-FT) DECREASING TO POOR (23000
                    KNOT-FT) AFTER MIDNIGHT.

.MONDAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (30-40 PERCENT).
MAX TEMPERATURE.....68-71.
MIN HUMIDITY........13-16 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY OR EAST SOUTHEAST AT 5-9 MPH
                    BECOMING SOUTHWEST AROUND 15 MPH WITH GUSTS OF 25 TO 30 MPH
                    IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH INCREASING TO AROUND 20
                    MPH LATE IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......5600-6600 FT AGL INCREASING TO 10900-11900 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH INCREASING TO AROUND 25
                    MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD (86700 KNOT-FT) INCREASING TO EXCELLENT
                    (205700 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.MONDAY NIGHT...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE UPPER 30S. SOUTHWEST WINDS AROUND 15 MPH.

.TUESDAY...COOLER. MOSTLY CLOUDY WITH CHANCE OF SHOWERS...SNOW
SHOWERS AND ISOLATED THUNDERSTORMS. LOWS IN THE UPPER 20S. HIGHS
IN THE LOWER 50S. WEST WINDS 15 TO 25 MPH.

.WEDNESDAY...COLDER. PARTLY CLOUDY WITH SLIGHT CHANCE OF
RAIN OR SNOW SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE LOWER 40S.
WEST WINDS 15 TO 25 MPH.

.THURSDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS...SNOW
SHOWERS AND ISOLATED THUNDERSTORMS. LOWS IN THE LOWER 30S. HIGHS
IN THE UPPER 40S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...GREG RESER
REASON FOR REQUEST...PRESCRIBED
.TAG 20120519.UPPER.01/RIW