FNUS75 KRIW 261613 FWSRIW SPOT FORECAST FOR POLECAT BENCH...IA CDC NATIONAL WEATHER SERVICE RIVERTON WY 1013 AM MDT SAT SEP 26 2009 FORECAST IS BASED ON IGNITION TIME OF 0930 MDT ON SEPTEMBER 26. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... STRONG JET STREAM WILL MOVE INTO SOUTHWESTERN CANADA TODAY. THE ASSOCIATED INCREASING WIND ALOFT WILL GRADUALLY MIX DOWN TO THE SURFACE THIS AFTERNOON AND EVENING. A BACKDOOR COLD FRONT WILL BRING COOLER TEMPERATURES ALONG WITH HIGHER RELATIVE HUMIDITY LEVELS TO THE AREA SUNDAY. A STRONG UPPER LEVEL TROUGH IS EXPECTED TO BRING WIDESPREAD...POSSIBLY SIGNIFICANT...RAINFALL TO THE FIRE AREA WEDNESDAY. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...LIPSON .TODAY... SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT). MAX TEMPERATURE.....87. MIN HUMIDITY........12 PERCENT. 20 FOOT WINDS.......EAST 5-9 MPH. WINDS BECOMING WEST 6 TO 12 MPH BY 1400. WINDS THEN SHIFTING TO THE WEST NORTHWEST AT 10 TO 20 MPH BY 1700. RIDGE TOP WINDS.....SOUTHEAST 10 TO 15 MPH SHIFTING TO WEST NORTHWEST AT 10 TO 20 MPH BY 1400. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1100 FT AGL INCREASING TO 6500 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....SOUTHEAST 13 TO 17 MPH SHIFTING TO THE WEST AROUND 17 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....POOR TO FAIR (12200-55700 KNOT-FT). .TONIGHT... SKY/WEATHER.........CLEAR (0-10 PERCENT). MIN TEMPERATURE.....49-52. MAX HUMIDITY........39-42 PERCENT. 20 FOOT WINDS.......NORTHWEST WINDS INCREASING TO 12 TO 22 MPH BY 2100. WINDS BECOMING NORTH WITH THE FRONTAL PASSAGE AT 15 TO 25 MPH BY 2300. NORTH WINDS INCREASING TO 20 TO 30 MPH BY 1100. RIDGE TOP WINDS.....NORTHWEST WINDS INCREASING TO 12 TO 22 MPH BY 2100. WINDS BECOMING NORTH WITH THE FRONTAL PASSAGE AT 15 TO 25 MPH BY 2300. NORTH WINDS INCREASING TO 20 TO 30 MPH BY 1100. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......3700 FT AGL DECREASING TO 900 FT AGL AFTER MIDNIGHT. TRANSPORT WINDS.....NORTHWEST 10 TO 17 MPH SHIFTING TO THE NORTH AROUND 22 TO 30 MPH EARLY IN THE MORNING. SMOKE DISPERSAL.....POOR (16000-38000 KNOT-FT). .SUNDAY... SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT). MAX TEMPERATURE.....71. MIN HUMIDITY........RELATIVE HUMIDITY REMAINING AROUND 40 PERCENT. 20 FOOT WINDS.......NORTH WINDS 20 TO 30 MPH DECREASING TO 10 TO 20 MPH BY 0700. NORTH WINDS DECREASING TO 10 TO 15 MPH BY 1000. EXPECT SOME NORTHERLY WIND GUSTS TO 20 MPH BY 1600. RIDGE TOP WINDS.....NORTH WINDS 20 TO 30 MPH DECREASING TO 10 TO 20 MPH BY 0700. NORTH WINDS DECREASING TO 10 TO 15 MPH BY 1000. EXPECT SOME NORTHERLY WIND GUSTS TO 20 MPH BY 1600. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......2100 FT AGL INCREASING TO 4600 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....NORTH 17 TO 23 MPH. SMOKE DISPERSAL.....POOR TO GOOD (36200-82000 KNOT-FT). .FORECAST DAYS 3 THROUGH 5... .SUNDAY NIGHT...COLDER...CLEAR. LOWS AROUND 40. WINDS GENERALLY LESS THAN 10 MPH. .MONDAY...MOSTLY CLEAR. LOWS AROUND 50. HIGHS IN THE UPPER 70S. WINDS GENERALLY LESS THAN 10 MPH. .TUESDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE UPPER 70S. WINDS GENERALLY LESS THAN 10 MPH. .WEDNESDAY...MUCH COOLER. MOSTLY CLOUDY. CHANCE OF SHOWERS...SNOW SHOWERS AND ISOLATED THUNDERSTORMS. LOWS IN THE MID 30S. HIGHS IN THE MID 50S. NORTH WINDS AROUND 10 MPH. $$ FORECASTER...LIPSON REQUESTED BY...BOB EVANS REASON FOR REQUEST...PRESCRIBED .TAG 20090926.POLEC.01/RIW