FNUS75 KRIW 061409 FWSRIW SPOT FORECAST FOR BROWN S SPRING...BLM RAD NATIONAL WEATHER SERVICE RIVERTON WY 809 AM MDT FRI MAY 6 2011 FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON MAY 06. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...WIND WILL INCREASE FROM THE WEST TODAY AS A WEAK DISTURBANCE SKIRTING NORTHERN WYOMING INCREASES THE PRESSURE GRADIENT ACROSS THE AREA. RH VALUES WILL BE HIGHER THAN YESTERDAY WITH SLIGHTLY LOWER TEMPERATURES. WHILE TEMPERATURE WILL REBOUND ON SATURDAY...INCREASED PACIFIC MOISTURE AHEAD OF THE NEXT STORM SYSTEM WILL KEEP RH VALUES ABOVE 20 PERCENT. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...BERC .TODAY... SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT). MAX TEMPERATURE.....61-64. MIN HUMIDITY........22-25 PERCENT. 20 FOOT WINDS.......WEST WINDS 12 TO 18 MPH. GUSTS UP TO 30 MPH INCREASING TO 35 MPH AFTER 4 PM. RIDGE TOP WINDS.....WEST 20 TO 25 MPH INCREASING TO AROUND 30 MPH LATE IN THE AFTERNOON. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......3500-4500 FT AGL INCREASING TO 8100-9100 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....WEST 23 TO 31 MPH. SMOKE DISPERSAL.....GOOD (85500 KNOT-FT) INCREASING TO EXCELLENT (218800 KNOT-FT) IN THE AFTERNOON. .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING PARTLY CLOUDY (50-60 PERCENT). MIN TEMPERATURE.....36-39. MAX HUMIDITY........60-63 PERCENT. 20 FOOT WINDS.......NORTHWEST WINDS 14 TO 22 MPH WITH GUSTS TO AROUND 40 MPH IN THE EVENING BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH. RIDGE TOP WINDS.....NORTHWEST AROUND 35 MPH BECOMING WEST AROUND 15 MPH. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......4500-5500 FT AGL DECREASING TO 400 FT AGL AFTER MIDNIGHT. TRANSPORT WINDS.....NORTHWEST AROUND 36 MPH BECOMING WEST 16 TO 25 MPH IN THE LATE EVENING AND OVERNIGHT. SMOKE DISPERSAL.....VERY GOOD (139200 KNOT-FT) DECREASING TO POOR (5200 KNOT-FT) AFTER MIDNIGHT. .SATURDAY... SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT). MAX TEMPERATURE.....64-67. MIN HUMIDITY........21-24 PERCENT. 20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING WEST 13 TO 14 MPH WITH GUSTS TO AROUND 25 MPH IN THE AFTERNOON. RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH SHIFTING TO THE WEST AROUND 25 MPH LATE IN THE AFTERNOON. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......4100-5100 FT AGL INCREASING TO 8800-9700 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....SOUTHWEST 15 TO 24 MPH SHIFTING TO THE WEST AROUND 25 MPH LATE IN THE AFTERNOON. SMOKE DISPERSAL.....GOOD (85700 KNOT-FT) INCREASING TO EXCELLENT (186100 KNOT-FT) IN THE AFTERNOON. .FORECAST DAYS 3 THROUGH 5... .SATURDAY NIGHT...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND ISOLATED THUNDERSTORMS IN THE EVENING. LOWS IN THE UPPER 30S. SOUTHWEST WINDS AROUND 11 MPH. .SUNDAY...MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND ISOLATED THUNDERSTORMS. LOWS IN THE MID 30S. HIGHS AROUND 60. WINDS GENERALLY LESS THAN 10 MPH. .MONDAY...COOLER. MOSTLY CLOUDY WITH CHANCE OF SHOWERS...SNOW SHOWERS AND ISOLATED THUNDERSTORMS. LOWS AROUND 30. HIGHS AROUND 50. WINDS GENERALLY LESS THAN 10 MPH. .TUESDAY...MOSTLY CLOUDY. CHANCE OF SHOWERS AND SNOW SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE UPPER 40S. WINDS GENERALLY LESS THAN 10 MPH. $$ FORECASTER...BERC REQUESTED BY...RICHARD PUTNAM REASON FOR REQUEST...PRESCRIBED .TAG 20110506.BROWN.01/RIW