FNUS75 KRIW 251713 FWSRIW SPOT FORECAST FOR WEST SLOPE RX...IA CDC NATIONAL WEATHER SERVICE RIVERTON WY 1113 AM MDT MON APR 25 2011 FORECAST IS BASED ON IGNITION TIME OF 1130 MDT ON APRIL 25. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...CLOUDS WILL BE INCREASING FROM THE WEST AS A SYSTEM APPROACHES FROM THE PACIFIC. THE ATMOSPHERE WILL DESTABILIZE THIS AFTERNOON ALLOWING FOR A CHANCE OF A THUNDERSTORM THIS AFTERNOON... MAINLY OVER HIGHER ELEVATIONS BUT THE BURN SITE COULD BE AFFECTED BY OUTFLOW WINDS FROM THE STORMS SHOULD ONE DEVELOP NEARBY. HOWEVER...SMOKE DISPERSAL WILL BE VERY GOOD IN THE UNSTABLE AIR. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...ALLEN .TODAY... SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) BECOMING MOSTLY CLOUDY (70-90 PERCENT) AFTER 1400. ISOLATED RAIN SHOWERS AND ISOLATED THUNDERSTORMS AFTER 1400. MAX TEMPERATURE.....55. MIN HUMIDITY........18-21 PERCENT. 20 FOOT WINDS.......UPSLOPE/UPVALLEY 2-6 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON. RIDGE TOP WINDS.....SOUTHEAST AROUND 10 MPH SHIFTING TO THE SOUTHWEST AFTER 1300. MIXING HEIGHT.......4000 FT AGL INCREASING TO 8000 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....SOUTH AROUND 12 MPH SHIFTING TO THE SOUTHWEST IN THE AFTERNOON. SMOKE DISPERSAL.....FAIR (40300 KNOT-FT) INCREASING TO VERY GOOD (103100 KNOT-FT) IN THE AFTERNOON. .TONIGHT... SKY/WEATHER.........CLOUDY (80-90 PERCENT). CHANCE OF RAIN SHOWERS EARLY IN THE EVENING...THEN SLIGHT CHANCE OF RAIN AND SNOW SHOWERS LATE IN THE EVENING. CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. MIN TEMPERATURE.....31. MAX HUMIDITY........90 PERCENT. 20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 3-7 MPH. RIDGE TOP WINDS.....WEST AROUND 10 MPH SHIFTING TO THE NORTH IN THE LATE EVENING AND EARLY MORNING...THEN SHIFTING TO THE SOUTHWEST EARLY IN THE MORNING. MIXING HEIGHT.......4600 FT AGL DECREASING TO 2500 FT AGL AFTER MIDNIGHT. TRANSPORT WINDS.....WEST AROUND 10 MPH SHIFTING TO THE NORTH AROUND 12 MPH IN THE LATE EVENING AND EARLY MORNING...THEN SHIFTING TO THE SOUTHWEST AROUND 9 MPH EARLY IN THE MORNING. SMOKE DISPERSAL.....FAIR (13200-48600 KNOT-FT). .TUESDAY... SKY/WEATHER.........CLOUDY (90-100 PERCENT). SNOW SHOWERS LIKELY IN THE MORNING. RAIN AND SNOW SHOWERS IN THE AFTERNOON. MAX TEMPERATURE.....42. MIN HUMIDITY........40 PERCENT. 20 FOOT WINDS.......UPSLOPE/UPVALLEY 3-7 MPH BECOMING NORTH 10 TO 12 MPH WITH HIGHER GUSTS IN THE AFTERNOON. RIDGE TOP WINDS.....NORTHWEST AROUND 10 MPH SHIFTING TO THE NORTH 15 TO 20 MPH IN THE AFTERNOON. MIXING HEIGHT.......4300-5300 FT AGL. TRANSPORT WINDS.....NORTH 12 TO 21 MPH. SMOKE DISPERSAL.....POOR (16200 KNOT-FT) INCREASING TO GOOD (74500 KNOT-FT) IN THE AFTERNOON. .FORECAST DAYS 3 THROUGH 5... .TUESDAY NIGHT...CLOUDY. SCATTERED SHOWERS AND SNOW SHOWERS IN THE EVENING...THEN SCATTERED SNOW SHOWERS AFTER MIDNIGHT. LOWS IN THE UPPER 20S. WINDS GENERALLY LESS THAN 10 MPH. .WEDNESDAY...MOSTLY CLOUDY. ISOLATED SNOW SHOWERS IN THE MORNING...THEN ISOLATED SHOWERS IN THE AFTERNOON. LOWS IN THE UPPER 20S. HIGHS IN THE MID 40S. WINDS GENERALLY LESS THAN 10 MPH. .THURSDAY...PARTLY CLOUDY. CHANCE OF SHOWERS...SNOW SHOWERS AND ISOLATED THUNDERSTORMS. LOWS IN THE LOWER 30S. HIGHS IN THE LOWER 50S. WINDS GENERALLY LESS THAN 10 MPH. .FRIDAY...COLDER...SHOWERS...SNOW SHOWERS LIKELY AND ISOLATED THUNDERSTORMS. LOWS IN THE UPPER 20S. HIGHS IN THE LOWER 40S. WINDS GENERALLY LESS THAN 10 MPH. $$ FORECASTER...ALLEN REQUESTED BY...CODY DISPATCH REASON FOR REQUEST...PRESCRIBED .TAG 20110425.WESTS.01/RIW