FNUS75 KRIW 111004 FWSRIW SPOT FORECAST FOR GREEN...USFS BTF NATIONAL WEATHER SERVICE RIVERTON WY 404 AM MDT SUN AUG 11 2013 FORECAST IS BASED ON REQUEST TIME OF 2203 MDT ON AUGUST 10. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...AN AREA OF SHOWERS AND THUNDERSTORMS OVER NORTHERN UTAH EARLY THIS MORNING WILL ROTATE ACROSS THE FIRE AREA AROUND OR SHORTLY AFTER NOON. THOUGH THIS ACTIVITY MAY WANE THROUGH THE MORNING...IT SHOULD BLOSSOM AGAIN WITH HEATING IN THE LATE MORNING/EARLY AFTERNOON. THIS SHOULD BE THE BRUNT OF THE ACTIVITY TODAY AS AN UPPER LOW OFF THE NORTHWEST COAST WILL CONTINUE TO PULL A DRIER AND WARMER AIRMASS ACROSS THE GREAT BASIN INTO WESTERN WYOMING. THUNDERSTORM ACTIVITY LATER THIS AFTERNOON THROUGH MONDAY SHOULD BE MORE ISOLATED. WINDS WILL BE LIGHT AND MAINLY TERRAIN DRIVEN IN THE ABSENCE OF THUNDERSTORMS. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...MEUNIER .TODAY... SKY/WEATHER.........SUNNY (0-10 PERCENT) THROUGH 1000...THEN BECOMING PARTLY CLOUDY (40-50 PERCENT). WIDELY SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPING BETWEEN 1000 AND NOON... BECOMING MORE ISOLATED LATE AFTERNOON. MAX TEMPERATURE.....67 TO 72. MIN HUMIDITY........20-23 PERCENT. 20 FOOT WINDS.......UPSLOPE/UPVALLEY 4-8 MPH BY 0900...BECOMING INCREASINGLY DOMINATED BY THUNDERSTORM OUTFLOWS IN THE EARLY AFTERNOON WITH GUSTS TO 35 MPH POSSIBLE. BECOMING NORTHWEST 5 TO 10 MPH IN THE LATE AFTERNOON. RIDGE TOP WINDS.....SOUTHWEST 5 TO 10 MPH. LAL.................1 UNTIL 1000...THEN 3 UNTIL 1500...THEN 2. CHC OF WETTING RAIN.10 PERCENT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1000-2000 FT AGL UNTIL 0900...INCREASING TO 12000 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....WEST 7 TO 13 MPH. SMOKE DISPERSAL.....POOR UNTIL 0900...GOOD BY NOON. .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) WITH ISOLATED SHOWERS AND THUNDERSTORMS IN THE EVENING...THEN CLEARING MIN TEMPERATURE.....46-49. MAX HUMIDITY........49-52 PERCENT. 20 FOOT WINDS.......NORTH 5 TO 10 MPH IN THE EVENING...BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH BY MIDNIGHT. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN THE EVENING. RIDGE TOP WINDS.....SOUTHWEST 5 TO 10 MPH. LAL.................2 UNTIL 2200...THEN 1. CHC OF WETTING RAIN.LESS THAN 5 PERCENT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......5800-6800 FT AGL DECREASING TO BELOW 1000 FT AGL AFTER MIDNIGHT. TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH. SMOKE DISPERSAL.....FAIR IN THE EVENING...BECOMING POOR BY MIDNIGHT. .MONDAY... SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT) THEN BECOMING PARTLY CLOUDY (30-40 PERCENT). ISOLATED SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....68-73. MIN HUMIDITY........18-21 PERCENT. 20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS. RIDGE TOP WINDS.....WEST 5 TO 10 MPH. LAL.................1 UNTIL 12000...THEN 2. CHC OF WETTING RAIN.LESS THAN 5 PERCENT. HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......1000-2000 FT AGL UNTIL 0900...INCREASING TO 13400-14400 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....WEST 5 TO 10 MPH. SMOKE DISPERSAL.....POOR UNTIL 0900...INCREASING TO VERY GOOD IN THE AFTERNOON. .FORECAST DAYS 3 THROUGH 5... .MONDAY NIGHT...PARTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS IN THE EVENING. LOWS AROUND 50. WINDS GENERALLY LESS THAN 10 MPH. .TUESDAY...PARTLY CLOUDY WITH SCATTERED SHOWERS AND THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE MID 60S. WINDS GENERALLY LESS THAN 10 MPH. .WEDNESDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS AROUND 70. WINDS GENERALLY LESS THAN 10 MPH. .THURSDAY...MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER 70S. WINDS GENERALLY LESS THAN 10 MPH. $$ FORECASTER...MEUNIER REQUESTED BY...ROD DYKEHOUSE REASON FOR REQUEST...WILDFIRE .TAG 20130810.GREEN.01/RIW