FNUS75 KRIW 140921 FWSRIW SPOT FORECAST FOR GREEN...USFS SHF NATIONAL WEATHER SERVICE RIVERTON WY 321 AM MDT WED AUG 14 2013 FORECAST IS BASED ON REQUEST TIME OF 2218 MDT ON AUGUST 13. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... TODAY WILL BE VERY SIMILAR IN MOST RESPECTS TO TUESDAY...EXCEPT FOR SLIGHTLY LESS SHOWER AND THUNDERSTORM COVERAGE...BUT MORE GUSTY WIND POTENTIAL WITH STORMS THAT DO FORM. HIGH TEMPERATURES WILL ALSO RISE A COUPLE OF DEGREES TODAY AND RH VALUES WILL DROP SOME. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...LIPSON .TODAY... SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT) THEN BECOMING MOSTLY CLOUDY (55-65 PERCENT). SCATTERED SHOWERS AND THUNDERSTORMS BY 1400 IN THE AFTERNOON. MAX TEMPERATURE.....67 AT 9000 FEET AND 62 AT 10500 FEET. MIN HUMIDITY........22 PERCENT AT 9000 FEET AND 27 PERCENT AT 10500 FEET. 20 FOOT WINDS.......WEST UPSLOPE/UPVALLEY 5-9 MPH WITH SOME GUSTS TO 12 MPH AFTER 1500. GUSTY AND ERRATIC WINDS EXPECTED NEAR ANY THUNDERSTORMS IN THE AFTERNOON. RIDGE TOP WINDS.....SOUTHWEST 5 TO 10 MPH SHIFTING TO THE WEST AROUND 15 MPH IN THE AFTERNOON. LAL.................1 UNTIL 0900...THEN 2 UNTIL 1200...THEN 4. CHC OF WETTING RAIN.27 PERCENT. HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......4500-5500 FT AGL INCREASING TO 9700-10500 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....WEST 12 TO 17 MPH. SMOKE DISPERSAL.....GOOD (65100 KNOT-FT) INCREASING TO VERY GOOD (140000 KNOT-FT) IN THE AFTERNOON. .TONIGHT... SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT). ISOLATED SHOWERS AND THUNDERSTORMS IN THE EVENING. MIN TEMPERATURE.....34-36. MAX HUMIDITY........64-67 PERCENT. 20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH FROM THE NORTHEAST. GUSTY AND ERRATIC WINDS EXPECTED NEAR ANY THUNDERSTORMS IN THE EVENING. RIDGE TOP WINDS.....WEST AROUND 15 MPH BECOMING NORTHEAST AROUND 5 MPH IN THE LATE EVENING AND EARLY MORNING...THEN SHIFTING TO THE EAST EARLY IN THE MORNING. LAL.................2 UNTIL 2400...THEN 1. CHC OF WETTING RAIN.15 PERCENT. HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......7700-8700 FT AGL DECREASING TO 3500-4500 FT AGL AFTER MIDNIGHT. TRANSPORT WINDS.....NORTHWEST 7 TO 16 MPH SHIFTING TO THE SOUTHWEST 6 TO 7 MPH AFTER MIDNIGHT. SMOKE DISPERSAL.....GOOD (89300 KNOT-FT) DECREASING TO POOR (19200 KNOT-FT) AFTER MIDNIGHT. .THURSDAY... SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT) THEN BECOMING PARTLY CLOUDY (25-35 PERCENT). MAX TEMPERATURE.....74 AT 9000 FEET AND 69 AT 10500 FEET. MIN HUMIDITY........14-16 PERCENT. 20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH MAINLY FROM THE WEST WITH SOME GUSTS TO 12 MPH BY 1500. RIDGE TOP WINDS.....WEST 5 TO 10 MPH. LAL.................1. CHC OF WETTING RAIN.ZERO PERCENT. HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......4100-5100 FT AGL INCREASING TO 9400-10400 FT AGL IN THE AFTERNOON. TRANSPORT WINDS.....NORTHWEST 7 TO 13 MPH. SMOKE DISPERSAL.....POOR (32500 KNOT-FT) INCREASING TO GOOD (93300 KNOT-FT) IN THE AFTERNOON. .FORECAST DAYS 3 THROUGH 5... .THURSDAY NIGHT...MOSTLY CLEAR. LOWS AROUND 40. WINDS GENERALLY LESS THAN 10 MPH. .FRIDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 70S. WINDS GENERALLY LESS THAN 10 MPH. .SATURDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE MID 70S. WINDS GENERALLY LESS THAN 10 MPH. .SUNDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE MID 70S. WINDS GENERALLY LESS THAN 10 MPH. $$ FORECASTER...LIPSON REQUESTED BY...DIANE RAU REASON FOR REQUEST...WILDFIRE .TAG 20130813.GREEN.01/RIW