FNUS75 KRIW 211042 FWSRIW SPOT FORECAST FOR FREAK MT UNIT 9...USFS SHF NATIONAL WEATHER SERVICE RIVERTON WY 442 AM MDT SAT MAR 21 2009 FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON MARCH 21. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...SOUTHWEST FLOW WILL BRING MOISTURE NORTH FROM THE GREAT BASIN ACROSS SOUTHWEST WYOMING INTO THE WIND RIVER MOUNTAINS LATER THIS AFTERNOON. THIS WILL BRING INCREASED CLOUD COVER AND A FEW AFTERNOON RAIN SHOWERS. ISOLATED THUNDERSTORMS ARE POSSIBLE OVER THE WIND RIVER MOUNTAINS THIS AFTERNOON AND EVENING AND MAY PRODUCE SMALL HAIL AND GUSTY WINDS. TEMPERATURES WILL REMAIN MILD TODAY. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...C.BAKER .TODAY... SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING MOSTLY CLOUDY AROUND 3 PM (60-70 PERCENT). SLIGHT CHANCE OF RAIN SHOWERS AND ISOLATED THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....58-60 AROUND 7500 FT TO 43 TO 46 AROUND 9000 FT. MIN HUMIDITY........24-26 PERCENT PERCENT AROUND 7500 FT TO 30-33 PERCENT AROUND 9000 FT. 20 FOOT WINDS.......SOUTHWEST WEST WINDS AROUND 10 MPH IN THE MORNING. IN THE LOWER SHELTERED ELEVATIONS UPSLOPE/UPVALLEY 5-9 MPH. BECOMING SOUTHWEST 15 TO 18 MPH EARLY IN THE AFTERNOON. GUSTS UP TO 27 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON. RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH INCREASING TO 15 TO 20 MPH IN THE AFTERNOON. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1500 FT AGL EARLY INCREASING TO 8000 FT AGL BY 1 PM. TRANSPORT WINDS.....SOUTHWEST AT 15 TO 20 MPH. SMOKE DISPERSAL.....BECOMING VERY GOOD BY 1 PM 120000-160000 KT-FT). .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). CHANCE OF RAIN SHOWERS THROUGH THE NIGHT. CHANCE OF SNOW SHOWERS AFTER MIDNIGHT. MIN TEMPERATURE.....32-35 AROUND 7500 FT. 27 TO 20 AROUND 9000 FT. MAX HUMIDITY........62-65 PERCENT AROUND 7500 FT. 75 TO 80 PERCENT AROUND 9000 FT. 20 FOOT WINDS.......SOUTHWEST WINDS 12 TO 16 MPH WITH GUSTS TO AROUND 25 MPH. RIDGE TOP WINDS.....SOUTHWEST WINDS 18 TO 24 MPH WITH GUSTS TO AROUND 35 MPH. HAINES INDEX........3 LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......DECREASING TO 1500 FT AGL. TRANSPORT WINDS.....SOUTHWEST WINDS 26 MPH. SMOKE DISPERSAL.....BECOMING POOR BY 11 PM 39000 KT-FT. .SUNDAY... SKY/WEATHER.........CLOUDY (90-100 PERCENT). CHANCE OF RAIN SHOWERS IN THE MORNING...THEN RAIN SHOWERS LIKELY AND ISOLATED THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....46-49. MIN HUMIDITY........27-30 PERCENT. 20 FOOT WINDS.......SOUTHWEST WINDS 17 TO 20 MPH. GUSTS UP TO 35 MPH DECREASING TO 25 MPH LATE IN THE AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON. RIDGE TOP WINDS.....SOUTHWEST WINDS 18 TO 24 MPH WITH GUSTS TO AROUND 35 MPH. HAINES INDEX........3 LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1500 FT AGL EARLY INCREASING TO 5000 FT AGL BY 1 PM. TRANSPORT WINDS.....SOUTHWEST WINDS 26 MPH. SMOKE DISPERSAL.....BECOMING VERY GOOD BY 1 PM 130000 KT-FT). .FORECAST DAYS 3 THROUGH 5... .SUNDAY NIGHT...RAIN AND SNOW LIKELY IN THE EVENING...THEN SNOW AFTER MIDNIGHT. LOWS IN THE UPPER 20S. NORTHWEST WINDS AROUND 12 MPH. .MONDAY...COLDER...SNOW. LOWS AROUND 17. HIGHS IN THE UPPER 20S. NORTH WINDS AROUND 18 MPH. .TUESDAY...MOSTLY CLOUDY WITH SCATTERED SNOW SHOWERS. LOWS AROUND 16. HIGHS IN THE LOWER 30S. NORTHWEST WINDS AROUND 13 MPH. .WEDNESDAY...CLOUDY WITH SCATTERED SNOW SHOWERS. LOWS AROUND 10. HIGHS IN THE UPPER 20S. WEST WINDS AROUND 16 MPH. $$ FORECASTER...C.BAKER REQUESTED BY...JACOB BINNS REASON FOR REQUEST...PRESCRIBED .TAG 20090321.FREAK.01/RIW