FNUS75 KRIW 291359 FWSRIW SPOT FORECAST FOR CASTLE...USFS SHF NATIONAL WEATHER SERVICE RIVERTON WY 759 AM MDT TUE SEP 29 2009 FORECAST IS BASED ON REQUEST TIME OF 0726 MDT ON SEPTEMBER 29. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. ...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM MDT THIS EVENING... .DISCUSSION... AN APPROACHING STORM SYSTEM WILL CREATE INCREASING SOUTHWEST WINDS TODAY. A COLD FRONT WILL SHIFT THE WINDS TO THE WEST THIS EVENING. THE COLD FRONT WILL USHER IN MUCH COLDER CONDITIONS AND PERIODS OF SHOWERS. SHOWERS WILL TURN TO SNOW AROUND MIDNIGHT TONIGHT. SNOW MAY MIX WITH RAIN WEDNESDAY AFTERNOON. WETTING RAIN AND SNOW IS EXPECTED LATE TONIGHT THROUGH WEDNESDAY. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...SMITH .TODAY... SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING MOSTLY CLOUDY (65-75 PERCENT). AREAS OF SMOKE. MAX TEMPERATURE.....71-74. MIN HUMIDITY........12-15 PERCENT. 20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST 15 TO 20 MPH WITH GUSTS TO AROUND 30 MPH AFTER 1400. RIDGE TOP WINDS.....SOUTHWEST AROUND 15 MPH INCREASING TO 25 TO 30 MPH IN THE AFTERNOON. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2000 FT AGL INCREASING TO 11000 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....SOUTHWEST AROUND 25 MPH. SMOKE DISPERSAL.....POOR (34000 KNOT-FT) INCREASING TO EXCELLENT (250300 KNOT-FT) IN THE AFTERNOON. .TONIGHT... SKY/WEATHER.........CLOUDY (85-95 PERCENT). AREAS OF SMOKE IN THE EVENING. SCATTERED RAIN SHOWERS AND ISOLATED THUNDERSTORMS IN THE EVENING...THEN RAIN CHANGING TO SNOW SHOWERS AROUND MIDNIGHT. MIN TEMPERATURE.....32-35. MAX HUMIDITY........83-86 PERCENT. 20 FOOT WINDS.......WEST WINDS 10 TO 15 MPH. GUSTS UP TO 30 MPH DECREASING TO 20 MPH AFTER MIDNIGHT. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE EVENING. RIDGE TOP WINDS.....WEST 20 TO 25 MPH. LAL.................2 UNTIL 2400...THEN 1. CHC OF WETTING RAIN.18 PERCENT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2500-3500 FT AGL. TRANSPORT WINDS.....SOUTHWEST 20 TO 25 MPH. SMOKE DISPERSAL.....GOOD (86400 KNOT-FT) DECREASING TO POOR (35900 KNOT-FT) AFTER MIDNIGHT. .WEDNESDAY... SKY/WEATHER.........CLOUDY (95-100 PERCENT). SNOW SHOWERS...POSSIBLY MIXING WITH RAIN IN THE AFTERNOON. MAX TEMPERATURE.....41-44. MIN HUMIDITY........57-60 PERCENT. 20 FOOT WINDS.......NORTH AROUND 10 MPH WITH GUSTS BETWEEN 15 TO 20 MPH. RIDGE TOP WINDS.....NORTHWEST 15 TO 20 MPH. LAL.................1. CHC OF WETTING RAIN.89 PERCENT. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......3000-3500 FT AGL. TRANSPORT WINDS.....WEST AROUND 20 MPH SHIFTING TO THE NORTHWEST IN THE LATE MORNING AND AFTERNOON. SMOKE DISPERSAL.....POOR TO GOOD (28200-69400 KNOT-FT). .FORECAST DAYS 3 THROUGH 5... .WEDNESDAY NIGHT...COLDER. SNOW SHOWERS IN THE EVENING...THEN SNOW SHOWERS LIKELY AFTER MIDNIGHT. LOWS IN THE LOWER 20S. NORTHWEST WINDS AROUND 11 MPH. .THURSDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND SNOW SHOWERS. LOWS AROUND 18. HIGHS IN THE LOWER 40S. WINDS GENERALLY LESS THAN 10 MPH. .FRIDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND SNOW SHOWERS. LOWS IN THE MID 20S. HIGHS IN THE LOWER 50S. WINDS GENERALLY LESS THAN 10 MPH. .SATURDAY...MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND SNOW SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE LOWER 50S. WINDS GENERALLY LESS THAN 10 MPH. $$ FORECASTER...SMITH REQUESTED BY...CLINT DAWSON REASON FOR REQUEST...WILDFIRE .TAG 20090929.CASTL.01/RIW