FNUS75 KRIW 211640
FWSRIW

SPOT FORECAST FOR BILLY CREEK SLASH PILE...BLM CAD
NATIONAL WEATHER SERVICE RIVERTON WY
1040 AM MDT FRI MAY 21 2010

FORECAST IS BASED ON IGNITION TIME OF 1130 MDT ON MAY 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A NEARLY STATIONARY COLD FRONT OVER NATRONA COUNTY WILL DRIFT
SLOWLY NORTHWARD INTO JOHNSON COUNTY THIS AFTERNOON. THE FRONT WILL
PRODUCE WIDESPREAD LIGHT TO MODERATE RAINFALL OVER THE BURN AREA
THIS AFTERNOON THROUGH THIS EVENING. AN EXCELLENT CHANCE FOR
WETTING RAINS IS ANTICIPATED WITH LOCALLY UP TO A THIRD OF AN INCH
POSSIBLE. LIGHT SOUTHEAST WIND WILL BE THE RULE UNTIL EARLY TONIGHT...BEFORE
MODERATE TO STRONG SOUTHEAST AND THEN SOUTHWEST WINDS SURFACE LATE
TONIGHT AND SATURDAY MORNING RESPECTIVELY.

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

FORECASTER...CHURCH

.TODAY...
SKY/WEATHER.........CLOUDY (80-90 PERCENT). SCATTERED LIGHT RAIN SHOWERS
                    IN THE MORNING...THEN NUMEROUS RAIN SHOWERS AND
                    ISOLATED THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....45-48.
MIN HUMIDITY........56-61 PERCENT.
WIND (20 FT)........SOUTHEAST 5-9 MPH. GUSTS UP TO 13 MPH IN
                    THE AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHEAST 5 TO 10 MPH SHIFTING TO THE SOUTHWEST 10
                    TO 15 MPH IN THE AFTERNOON.
MIXING HEIGHT.......4000-5000 FT AGL.
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH.
SMOKE DISPERSAL.....FAIR TO GOOD (40000-75000 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........CLOUDY (90-100 PERCENT). NUMEROUS RAIN SHOWERS
                    AND ISOLATED THUNDERSTORMS IN THE
                    EVENING...THEN SCATTERED RAIN SHOWERS AFTER MIDNIGHT.
MIN TEMPERATURE.....36-39.
MAX HUMIDITY........93-97 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 8-14 MPH WITH GUSTS TO
                    20 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS IN THE EVENING.
RIDGE TOP WINDS.....SOUTHEAST 14 TO 20 MPH SHIFTING TO THE
                    SOUTHWEST 17 TO 22 MPH AFTER MIDNIGHT.
MIXING HEIGHT.......2100-3100 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 15 TO 19 MPH SHIFTING TO THE
                    SOUTHWEST 18 TO 24 MPH AFTER MIDNIGHT.
SMOKE DISPERSAL.....POOR (16100-34500 KNOT-FT).

.SATURDAY...
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (55-65 PERCENT). ISOLATED RAIN
                    SHOWERS IN THE AFTERNOON.
MAX TEMPERATURE.....45-48.
MIN HUMIDITY........33-36 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 13 TO 18 MPH. GUSTS UP TO 20
                    MPH INCREASING TO 30 MPH IN THE LATE MORNING
                    AND AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 20 TO 25 MPH.
MIXING HEIGHT.......2800-3800 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 20 TO 26 MPH.
SMOKE DISPERSAL.....FAIR TO GOOD (53800-93200 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.SATURDAY NIGHT...PARTLY CLOUDY. LOWS IN THE LOWER 30S. WEST
WINDS AROUND 15 MPH.
.SUNDAY...MOSTLY CLOUDY. CHANCE OF SHOWERS AND SNOW SHOWERS. LOWS
IN THE UPPER 30S. HIGHS IN THE MID 40S. SOUTHEAST WINDS AROUND
10 MPH.
.MONDAY...MOSTLY CLOUDY. CHANCE OF SHOWERS...THUNDERSTORMS AND
SLIGHT CHANCE OF SNOW SHOWERS. LOWS IN THE MID 30S. HIGHS AROUND
50. WEST WINDS AROUND 13 MPH.
.TUESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS AROUND 50. WEST WINDS
AROUND 10 MPH.

$$

FORECASTER...CHURCH
REQUESTED BY...BOB BUHR
REASON FOR REQUEST...PRESCRIBED
.TAG 20100521.BILLY.01/RIW