FNUS75 KRIW 312021 FWSRIW SPOT FORECAST FOR BRETECHE CREEK...IA CDC NATIONAL WEATHER SERVICE RIVERTON WY 221 PM MDT THU MAR 31 2011 FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON APRIL 01. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. ...HIGH WIND WARNING IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... .DISCUSSION...STRONG NORTHWEST FLOW OVER THE AREA TODAY WILL TAPER OFF AROUND MIDNIGHT TONIGHT...WITH WEST NORTHWEST FLOW CONTINUING AT THE HIGHER ELEVATIONS THROUGH FRIDAY. SCATTERED SHOWERS IN THE MOUNTAINS WILL ALSO CONTINUE THROUGH MID DAY FRIDAY...BUT NOT LIKELY OVER THE BURN AREA. WIND SPEEDS SHOULD DECREASE THROUGH THE DAY ON FRIDAY AS WELL...BUT STAY OUT OF THE WEST. SATURDAY WILL SEE A RETURN OF HIGH CLOUDS...AND WINDS MORE OUT OF THE SOUTHWEST AS ANOTHER STORM SYSTEM BEGINS TO MOVE INTO THE AREA. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...MCDONALD .FRIDAY... SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) WITH ISOLATED RAIN SHOWERS AND SNOW SHOWERS IN THE MORNING. BECOMING PARTLY CLOUDY (30-50 PERCENT) IN THE AFTERNOON. MAX TEMPERATURE.....45-50. MIN HUMIDITY........35-40 PERCENT. 20 FOOT WINDS.......WEST WINDS 10 TO 15 MPH WITH GUSTS TO AROUND 20 MPH...DECREASING TO 8 TO 12 MPH IN THE LATE AFTERNOON. RIDGE TOP WINDS.....WEST 20 TO 30 MPH. LAL.................1. CHC OF WETTING RAIN.LESS THAN 5 PERCENT. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1400-2400 FT AGL INCREASING TO 4000-5000 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....WEST 25 TO 35 MPH. SMOKE DISPERSAL.....FAIR (40000 KNOT- FT) INCREASING TO VERY GOOD (175000 KNOT-FT) IN THE AFTERNOON. .FRIDAY NIGHT... SKY/WEATHER.........PARTLY CLOUDY (30-50 PERCENT). MIN TEMPERATURE.....32-35. MAX HUMIDITY........70-80 PERCENT. 20 FOOT WINDS.......WEST WINDS 8 TO 12 MPH WITH GUSTS TO AROUND 18 MPH UNTIL MIDNIGHT BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH. RIDGE TOP WINDS.....WEST 20 TO 25 MPH DECREASING TO 10 TO 15 MPH AFTER MIDNIGHT. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......600-1600 FT AGL. TRANSPORT WINDS.....WEST AROUND 30 MPH DECREASING TO 10 TO 12 MPH IN THE LATE EVENING AND OVERNIGHT. SMOKE DISPERSAL.....POOR TO FAIR (6000-48000 KNOT-FT). .SATURDAY... SKY/WEATHER.........CLOUDY (75-85 PERCENT). SCATTERED RAIN SHOWERS IN THE LATE AFTERNOON. MAX TEMPERATURE.....48-54. MIN HUMIDITY........30-35 PERCENT. 20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST 15 TO 18 MPH WITH GUSTS TO AROUND 25 MPH LATE IN THE AFTERNOON. RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH INCREASING TO AROUND 25 MPH LATE IN THE AFTERNOON. LAL.................1. CHC OF WETTING RAIN.10 PERCENT. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......500 FT AGL INCREASING TO 4200 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....WEST 8 TO 13 MPH BECOMING SOUTHWEST AND INCREASING TO AROUND 35 MPH. SMOKE DISPERSAL.....POOR (4000 KNOT-FT) INCREASING TO VERY GOOD (147000 KNOT-FT) IN THE AFTERNOON. .FORECAST DAYS 3 THROUGH 5... .SATURDAY NIGHT...RAIN AND SNOW LIKELY IN THE EVENING...THEN CHANCE OF SNOW AFTER MIDNIGHT. LOWS IN THE LOWER 30S. WEST WINDS AROUND 16 MPH. .SUNDAY...COLDER. CLOUDY WITH SNOW LIKELY. LOWS IN THE LOWER 20S. HIGHS IN THE MID 30S. WINDS GENERALLY LESS THAN 10 MPH. .MONDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SNOW. LOWS IN THE UPPER 20S. HIGHS AROUND 40. WINDS GENERALLY LESS THAN 10 MPH. .TUESDAY...MOSTLY CLOUDY. CHANCE OF RAIN AND SNOW. LOWS AROUND 30. HIGHS IN THE LOWER 40S. WINDS GENERALLY LESS THAN 10 MPH. $$ FORECASTER...MCDONALD REQUESTED BY...RXB2 MONONI REASON FOR REQUEST...PRESCRIBED .TAG 20110401.BRETE.01/RIW