FNUS75 KRIW 072026 FWSRIW SPOT FORECAST FOR BUTTE...NPS YNP NATIONAL WEATHER SERVICE RIVERTON WY 226 PM MDT MON SEP 7 2009 FORECAST IS BASED ON REQUEST TIME OF 1404 MDT ON SEPTEMBER 07. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... WEAK SHOWERS CONTINUE TO DEVELOP OVER NORTHWESTERN WYOMING THIS AFTERNOON. COVERAGE OF SHOWER ACTIVITY IS EXPECTED TO INCREASE THIS AFTERNOON...WITH SCATTERED SHOWERS AND THUNDERSTORMS POSSIBLE OVER THE FIRE. THUNDERSTORM ACTIVITY WILL CONTAIN THREATS OF GUSTY WIND AND CLOUD TO GROUND LIGHTNING. SLIGHTLY ELEVATED WIND WILL REMAIN OVER THE FIRE THIS AFTERNOON...WEAKENING OVERNIGHT. COOLER TEMPERATURES EXPECTED OVER THE NEXT COUPLE OF DAYS. ISOLATED RAIN SHOWERS WILL CONTINUE THROUGH THE OVERNIGHT HOURS...THOUGH WILL WEAKEN DURING THE MORNING HOURS AS THE LOW PRESSURE SYSTEM MOVES FURTHER EASTWARD. THE MOVEMENT OF THIS SYSTEM EAST WILL BRING DRY CONDITIONS TUESDAY AFTERNOON AND EVENING. ...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS... ...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT... FORECASTER...BRANHAM .REST OF TODAY... SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT). SCATTERED SHOWERS AND THUNDERSTORMS. MAX TEMPERATURE.....62-67 BELOW 8500 FT...60-64 ABOVE 8500 FT. MIN HUMIDITY........45-50 PERCENT. 20 FOOT WINDS.......SOUTHWEST WIND 10 TO 15 MPH WITH GUSTS TO AROUND 25 MPH. GUSTY AND ERRATIC WIND EXPECTED NEAR THUNDERSTORMS. RIDGE TOP WINDS.....SOUTHWEST 15 TO 20 MPH. LAL.................4. CHC OF WETTING RAIN.12 PERCENT. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......6600 FT AGL. TRANSPORT WINDS.....SOUTHWEST 21 TO 23 MPH. SMOKE DISPERSAL.....VERY GOOD (124500 KNOT-FT). .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SCATTERED THUNDERSTORMS THROUGH 2200. SCATTERED RAIN SHOWERS THROUGH THE NIGHT. MIN TEMPERATURE.....33-37 BELOW 8500 FT..31-35 ABOVE 8500 FT. MAX HUMIDITY........95-100 PERCENT. 20 FOOT WINDS.......BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH BY 2200. GUSTY AND ERRATIC WIND EXPECTED NEAR THUNDERSTORMS IN THE EVENING. RIDGE TOP WINDS.....SOUTHWEST AROUND 15 MPH BECOMING NORTHWEST AROUND 5 MPH BY 2200...THEN SHIFTING TO THE SOUTHWEST BT 0200 SHIFTING TO THE NORTH BY 0400. LAL.................4 UNTIL 2200...THEN 1. CHC OF WETTING RAIN.16 PERCENT. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......DECREASING TO 700 FT AGL BY 0200. TRANSPORT WINDS.....SOUTHWEST 10-15 MPH SHIFTING TO THE NORTHWEST AROUND 10 MPH BY 2200...THEN SHIFTING TO THE SOUTHWEST AROUND 15 MPH BY 0100 SHIFTING TO THE NORTH BY 0400. SMOKE DISPERSAL.....POOR (3700-21100 KNOT-FT). .TUESDAY... SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING MOSTLY SUNNY (25-35 PERCENT) BY 1100. CHANCE OF RAIN SHOWERS IN THE MORNING THROUGH 1200. MAX TEMPERATURE.....61-65 BELOW 8500 FT...59-63 ABOVE 8500 FT. MIN HUMIDITY........19-25 PERCENT. 20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING WEST AT 10 TO 15 MPH BY 1400 RIDGE TOP WINDS.....SOUTHEAST 4-8 MPH SHIFTING TO THE WEST AND INCREASING TO 10-15 MPH BY 1400. LAL.................1. CHC OF WETTING RAIN.6 PERCENT. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. MIXING HEIGHT.......INCREASING TO 4700 FT AGL BY 1400. TRANSPORT WINDS.....SOUTHEAST AROUND 12 MPH SHIFTING TO THE WEST 14 TO 18 MPH IN THE AFTERNOON. SMOKE DISPERSAL.....POOR TO GOOD (24000-64700 KNOT-FT). .FORECAST DAYS 3 THROUGH 5... .TUESDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 30S. WINDS GENERALLY LESS THAN 10 MPH. .WEDNESDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE LOWER 70S. WINDS GENERALLY LESS THAN 10 MPH. .THURSDAY...MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE MID 70S. WINDS GENERALLY LESS THAN 10 MPH. .FRIDAY...MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE UPPER 60S. WINDS GENERALLY LESS THAN 10 MPH. $$ FORECASTER...BRANHAM REQUESTED BY...LAURA DOOLEY REASON FOR REQUEST...WILDFIRE .TAG 20090907.BUTTE.01/RIW