FNUS75 KRIW 111531 FWSRIW SPOT FORECAST FOR CARTER MTN RX...USFS SHF NATIONAL WEATHER SERVICE RIVERTON WY 931 AM MDT WED APR 11 2012 FORECAST IS BASED ON IGNITION TIME OF 0905 MDT ON APRIL 11. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. CORRECTED TIMES FOR WINDS TODAY. .DISCUSSION...THE DAY WILL START OUT DRY TODAY WITH INCREASING CLOUDS AROUND NOON. A COLD FRONT WILL APPROACH THE STATE FROM THE WEST AND WINDS WILL INCREASE OUT OF THE SOUTH AHEAD OF THE FRONT. THE FRONT WILL PASS THROUGH THE AREA BETWEEN 7 PM AND 10 PM TONIGHT WITH GUSTY WINDS WITH ITS PASSAGE ALONG WITH ISOLATED SHOWERS AND THUNDERSTORMS. WINDS WILL BECOME WEST AFTER THE FRONTAL PASSAGE AND INCREASE LATE TONIGHT. COLDER AIR MOVING IN BEHIND THE FRONT WILL ALLOW ANY RAIN SHOWERS TO MIX WITH AND CHANGE TO SNOW SHOWERS. THURSDAY WILL BE A BREEZY AND MUCH COOLER DAY WITH A SCATTERING OF RAIN AND SNOW SHOWERS. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...HATTINGS .TODAY... SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT) THEN BECOMING PARTLY CLOUDY (45-55 PERCENT) AFTER 1100. ISOLATED SHOWERS AND THUNDERSTORMS POSSIBLE AFTER 1400. MAX TEMPERATURE.....60-65. MIN HUMIDITY........14-19 PERCENT. 20 FOOT WINDS.......UPSLOPE/UPVALLEY 5 TO 10 MPH BECOMING SOUTH AROUND 10 TO 20 MPH WITH GUSTS TO 25 TO 30 MPH AFTER 1300. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS AFTER 1400. RIDGE TOP WINDS.....SOUTHEAST TO SOUTHEAST 5 TO 10 MPH THROUGH 1300... THEN INCREASING TO 15 TO 25 MPH AFTER 1300. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1300-2300 FT AGL INCREASING TO 7000-8000 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....LIGHT AND VARIABLE WINDS BECOMING SOUTH 10 TO 20 MPH IN THE LATE MORNING AND AFTERNOON. SMOKE DISPERSAL.....POOR (23800 KNOT-FT) INCREASING TO VERY GOOD (118500 KNOT-FT) IN THE AFTERNOON. .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT) THEN BECOMING MOSTLY CLOUDY (65-75 PERCENT). ISOLATED THUNDERSTORMS UNTIL 2200. SCATTERED RAIN SHOWERS THROUGH THE NIGHT. MIN TEMPERATURE.....38 TO 43. MAX HUMIDITY........55-60 PERCENT. 20 FOOT WINDS.......SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 30 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS UNTIL 2200. RIDGE TOP WINDS.....SOUTH TO SOUTHWEST AT 20 TO 25 MPH SHIFTING TO THE WEST 20 TO 30 MPH AFTER MIDNIGHT...THEN INCREASING TO 25 TO 35 MPH AFTER 0300. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......5600-6600 FT AGL DECREASING TO 800-1800 FT AGL AFTER MIDNIGHT. TRANSPORT WINDS.....SOUTH TO SOUTHWEST 20 TO 30 MPH SHIFTING TO THE WEST AFTER MIDNIGHT...THEN INCREASING TO 30 TO 40 MPH AFTER 0300. SMOKE DISPERSAL.....VERY GOOD (101000 KNOT-FT) DECREASING TO FAIR (40000 KNOT-FT) AFTER MIDNIGHT. .THURSDAY... SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). SCATTERED SNOW AND RAIN SHOWERS IN THE MORNING. SCATTERED RAIN AND SNOW SHOWERS IN THE AFTERNOON. MAX TEMPERATURE.....44-48. MIN HUMIDITY........25-30 PERCENT. 20 FOOT WINDS.......WEST WINDS 15 TO 25 MPH WITH GUSTS UP TO 35 MPH. RIDGE TOP WINDS.....WEST 30 TO 40 MPH DECREASING TO 20 TO 30 MPH IN THE AFTERNOON. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......3800-4800 FT AGL INCREASING TO 7100-8100 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....WEST 30 TO 40 MPH THROUGH 1200...WEST DECREASING TO 20 TO 30 MPH AFTER 1200. SMOKE DISPERSAL.....GOOD (90000 KNOT-FT) INCREASING TO EXCELLENT (210000 KNOT-FT) IN THE AFTERNOON. .FORECAST DAYS 3 THROUGH 5... .THURSDAY NIGHT...COLDER. PARTLY CLOUDY. SCATTERED SHOWERS AND SNOW SHOWERS IN THE EVENING...THEN ISOLATED SNOW SHOWERS AFTER MIDNIGHT. LOWS IN THE UPPER 20S. WEST WINDS AROUND 21 MPH. .FRIDAY...MOSTLY CLOUDY WITH SCATTERED SHOWERS AND SNOW SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE LOWER 40S. WINDS GENERALLY LESS THAN 10 MPH. .SATURDAY...SNOW SHOWERS LIKELY. LOWS IN THE UPPER 20S. HIGHS IN THE MID 30S. NORTH WINDS AROUND 11 MPH. .SUNDAY...PARTLY CLOUDY. CHANCE OF SNOW AND SLIGHT CHANCE OF RAIN. LOWS AROUND 30. HIGHS IN THE UPPER 30S. WINDS GENERALLY LESS THAN 10 MPH. $$ FORECASTER...HATTINGS REQUESTED BY...TRAVIS BRATEN REASON FOR REQUEST...PRESCRIBED .TAG 20120411.CARTE.01/RIW