FNUS75 KRIW 172132 FWSRIW SPOT FORECAST FOR ANTELOPE...NPS YNP NATIONAL WEATHER SERVICE RIVERTON WY 332 PM MDT FRI SEP 17 2010 FORECAST IS BASED ON REQUEST TIME OF 1512 MDT ON SEPTEMBER 17. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... SOME MID LEVEL CLOUDS REMAIN NEAR THE FIRE THIS AFTERNOON IN RESPONSE TO A NEARBY DISTURBANCE WHICH IS NOT EXPECTED TO MOVE OVER THE FIRE. THESE CLOUDS MAY REMAIN OVER THE AREA... WITH A SLIGHT CHANCE TO BRING SOME ISOLATED RAIN SHOWERS OVER THE FIRE...THOUGH THE THREAT OF THIS OCCURRING IS SMALL. ANY LINGERING SHOWER ACTIVITY WILL TAPER OFF OVERNIGHT AS THIS SYSTEM MOVES FURTHER NORTH AND EAST. GENERALLY DRY CONDITIONS WILL BE FOUND OVER THE FIRE ON SATURDAY...WITH SLIGHTLY WARMER TEMPERATURES AND SLIGHTLY LOWER DAYTIME HUMIDITY. WIND WILL TURN MORE SOUTHWESTERLY IN THE AFTERNOON...AND WILL INCREASE OVER THE FIRE TO BRING SOME BREEZY CONDITIONS IN THE AFTERNOON WHICH WILL LINGER INTO THE EVENING HOURS. THE NEXT CHANCE FOR SHOWER ACTIVITY WILL BEGIN SUNDAY AFTERNOON AS A STRONGER AREA OF LOW PRESSURE MOVES TOWARDS THE FIRE. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...BRANHAM .TODAY... SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT). ISOLATED RAIN SHOWERS POSSIBLE THROUGH 1600. MAX TEMPERATURE.....72-77. MIN HUMIDITY........24-28 PERCENT. 20 FOOT WINDS.......SOUTHWEST AT 8 TO 14 MPH WITH GUSTS TO AROUND 25 MPH. RIDGE TOP WINDS.....SOUTHWEST 20 TO 25 MPH. LAL.................1. CHC OF WETTING RAIN.4 PERCENT. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......6400-7400 FT AGL. TRANSPORT WINDS.....SOUTHWEST 25 TO 30 MPH. SMOKE DISPERSAL.....INCREASING TO VERY GOOD (124100 KNOT-FT). .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT). MIN TEMPERATURE.....35-39. MAX HUMIDITY........68-73 PERCENT. 20 FOOT WINDS.......WEST WINDS 8 TO 12 MPH WITH GUSTS TO AROUND 15 MPH EARLY THROUGH 2000...THEN BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH. RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........INCREASING TO 5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH BY 0400. MIXING HEIGHT.......DECREASING TO 1900-2900 FT AGL BY 0200. TRANSPORT WINDS.....WEST 15 TO 20 MPH DECREASING TO AROUND 8 MPH BY 2100...THEN SHIFTING TO THE SOUTH AT 8 TO 10 MPH AFTER 0100. SMOKE DISPERSAL.....DECREASING TO POOR (15200 KNOT-FT) BY 0200. .SATURDAY... SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT). MAX TEMPERATURE.....69-72. MIN HUMIDITY........20-25 PERCENT. 20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST 10 TO 15 MPH WITH GUSTS TO AROUND 25 MPH AFTER 1200. RIDGE TOP WINDS.....SOUTH 15 TO 20 MPH INCREASING TO SOUTHWEST 25 TO 30 MPH AFTER 1200. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH...DECREASING TO 4 AFTER 1400. MIXING HEIGHT.......INCREASING TO 7400-8400 FT AGL AFTER 1400. TRANSPORT WINDS.....SOUTH 10 TO 15 MPH INCREASING TO SOUTHWEST 25 TO 30 MPH AFTER 1100. SMOKE DISPERSAL.....INCREASING TO EXCELLENT (167100 KNOT-FT) AFTER 1200. .FORECAST DAYS 3 THROUGH 5... .SATURDAY NIGHT...PARTLY CLOUDY. LOWS IN THE UPPER 30S. SOUTHWEST WINDS AROUND 11 MPH. .SUNDAY...PARTLY CLOUDY WITH CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 70S. SOUTHWEST WINDS AROUND 10 MPH. .MONDAY...COOLER. MOSTLY CLOUDY. CHANCE OF SHOWERS...SLIGHT CHANCE OF THUNDERSTORMS AND SNOW SHOWERS. LOWS IN THE LOWER 30S. HIGHS IN THE UPPER 50S. WINDS GENERALLY LESS THAN 10 MPH. .TUESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS IN THE LOWER 30S. HIGHS IN THE MID 50S. WINDS GENERALLY LESS THAN 10 MPH. $$ FORECASTER...BRANHAM REQUESTED BY...LAURA DOOLEY REASON FOR REQUEST...WILDFIRE .TAG 20100917.ANTEL.01/RIW