FNUS75 KRIW 031110 FWSRIW SPOT FORECAST FOR UPPER CLARKS FORK RX...WY-SHF NATIONAL WEATHER SERVICE RIVERTON WY 510 AM MDT TUE APR 3 2012 FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON APRIL 03. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...DRY TODAY WITH FAIRLY LIGHT WIND. DRY TONIGHT WITH SOME WIND EXPECTED. ON WEDNESDAY THE WIND SPEEDS WILL INCREASE AHEAD OF A COLD FRONT. IT WILL REMAIN DRY WEDNESDAY AHEAD OF THE FRONT. THE COLD FRONT LOOKS TO PASS THROUGH THE BURN AREA BETWEEN 600 PM AND 900 PM WEDNESDAY EVENING. ISOLATED RAIN OR SNOW SHOWERS WILL DEVELOP AFTER MIDNIGHT WEDNESDAY NIGHT. THEN COLDER WITH A CHANCE OF RAIN AND SNOW THURSDAY INTO THURSDAY NIGHT. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...AR .TODAY... SKY/WEATHER.........MOSTLY SUNNY. MAX TEMPERATURE.....AROUND 50. MIN HUMIDITY........30-35 PERCENT. 20 FOOT WINDS.......VARIABLE AT 3 TO 6 MPH UNTIL 0900...THEN BECOMING SOUTH TO SOUTHEAST AT 5 TO 8 MPH AFTER 0900. THEN SOUTH TO SOUTHWEST AT 6 TO 10 MPH AFTER 1200. RIDGE TOP WINDS.....VARIABLE AT 4 TO 7 MPH UNTIL 0900...THEN BECOMING SOUTH TO SOUTHEAST AT 6 TO 10 MPH AFTER 0900. THEN SOUTH TO SOUTHWEST AT 10 TO 15 MPH AFTER 1200. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......INCREASING TO 3000-3500 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....SOUTH AROUND 10 MPH IN THE MORNING. SOUTH TO SOUTHWEST 10 TO 15 MPH IN THE AFTERNOON. SMOKE DISPERSAL.....BECOMING FAIR AFTER 1200. .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY. MIN TEMPERATURE.....29-34. MAX HUMIDITY........65-70 PERCENT. 20 FOOT WINDS.......SOUTHWEST TO WEST AT 6 TO 10 UNTIL MIDNIGHT. WEST AT 10 TO 15 MPH AFTER MIDNIGHT. RIDGE TOP WINDS.....SOUTHWEST TO WEST AT 9 TO 13 MPH UNTIL MIDNIGHT. WEST AT AT 13 TO 18 MPH WITH GUSTS TO 23 MPH AFTER MIDNIGHT. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......DECREASING TO 1000-1500 FT AGL AROUND MIDNIGHT. TRANSPORT WINDS.....SOUTHWEST AT 10 TO 15 MPH UNTIL MIDNIGHT WEST AROUND 15 MPH AFTER MIDNIGHT. SMOKE DISPERSAL.....FAIR...BECOMING POOR AROUND MIDNIGHT. .WEDNESDAY... SKY/WEATHER.........PARTLY CLOUDY IN THE MORNING. TURNING MOSTLY CLOUDY IN THE AFTERNOON. MAX TEMPERATURE.....52-56. MIN HUMIDITY........35-40 PERCENT. 20 FOOT WINDS.......WEST TO SOUTHWEST AT 8 TO 13 MPH UNTIL 1100. WEST TO SOUTHWEST AT 13 TO 18 MPH WITH GUSTS TO 25 MPH AFTER 1100. RIDGE TOP WINDS.....WEST TO SOUTHWEST AT 11 TO 16 MPH UNTIL 1100. WEST TO SOUTHWEST AT 17 TO 22 MPH WITH GUSTS TO 30 MPH AFTER 1100.. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......INCREASING TO 3500-4000 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....WEST TO SOUTHWEST AT 10 TO 15 MPH UNTIL 1100. WEST TO SOUTHWEST AT 20 TO 25 MPH AFTER 1100. SMOKE DISPERSAL.....BECOMING FAIR BY 1100...THEN BECOMING GOOD AFTER 1100. .FORECAST DAYS 3 THROUGH 5... .WEDNESDAY NIGHT...MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW AFTER MIDNIGHT. LOWS IN THE UPPER 20S. WEST WIND 15 TO 20 MPH WITH GUSTS TO 30 MPH WITH FRONTAL PASSAGE...WIND DECREASING TO 5 TO 10 MPH LATE IN THE NIGHT. .THURSDAY...CLOUDY WITH CHANCE OF RAIN AND SNOW. HIGHS 35 TO 40. SOUTH TO SOUTHEAST 5 TO 10 MPH. .FRIDAY...CLOUDY WITH CHANCE OF SNOW SHOWERS. LOWS 20 TO 25. HIGHS IN THE LOWER 30S. WEST WINDS 10 TO 15 MPH. .SATURDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS. LOWS IN THE LOWER 20S. HIGHS IN THE LOWER 30S. WEST TO SOUTHWEST WIND 10 TO 20 MPH. $$ FORECASTER...ROSS REQUESTED BY...CLINT DAWSON REASON FOR REQUEST...PRESCRIBED .TAG 20120403.UPPER.01/RIW