FNUS75 KRIW 082201
FWSRIW

SPOT FORECAST FOR BUTTE...NPS YNP
NATIONAL WEATHER SERVICE RIVERTON WY
401 PM MDT TUE SEP 8 2009

FORECAST IS BASED ON REQUEST TIME OF 1541 MDT ON SEPTEMBER 08.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...COOL DRY FRONT MOVED THROUGH THE AREA TODAY. MIN
TEMPS OVERNIGHT WILL APPROACH FREEZING...WHILE MAX TEMPS TOMORROW
SHOULD REBOUND TO WARMER THAN TODAY. HUMIDITY VALUES WED AFTERNOON
WILL BE SOMEWHAT DRIER...WITH WIND GUSTS INCREASING AS WELL. CLEAR
SKIES WILL CONTINUE UNTIL THURSDAY WHEN HIGH CLOUDS APPROACH IN
ADVANCE OF NEXT STORM SYSTEM. THURSDAY SHOULD BE WARMEST AND
DRIEST. COLD FRONT TO DROP DOWN THURSDAY NIGHT AND SHIFT WINDS TO
NORTHEAST. UNCERTAIN ON PRECIPITATION CHANCES AT THIS TIME.

...THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS...
...HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT...

FORECASTER...MCDONALD

.REST OF TODAY...
SKY/WEATHER.........SUNNY (5-10 PERCENT).
MAX TEMPERATURE.....58-60.
MIN HUMIDITY........20-25 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS 8 TO 10 MPH.
RIDGE TOP WINDS.....WEST 12 TO 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.......6400 FT AGL.
TRANSPORT WINDS.....WEST AROUND 18 MPH.
SMOKE DISPERSAL.....VERY GOOD (110000 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........CLEAR (5-10 PERCENT).
MIN TEMPERATURE.....32-35.
MAX HUMIDITY........70-80 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....NORTHWEST 5 TO 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3500 FT AGL DECREASING TO 500 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTHWEST 8 TO 12 MPH.
SMOKE DISPERSAL.....FAIR TO POOR (4000-42000 KNOT-FT).

.WEDNESDAY...
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....65-68.
MIN HUMIDITY........16-20 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH WITH GUSTS UP TO
                    15 MPH.
RIDGE TOP WINDS.....NORTHEAST 5 TO 10 MPH SHIFTING TO THE WEST
                    AND INCREASING TO 12 TO 15 MPH AFTER 1400.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......3600 FT AGL INCREASING TO 7000 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHEAST 10 TO 15 MPH SHIFTING TO THE WEST
                    AFTER 1400.
SMOKE DISPERSAL.....POOR BECOMING VERY GOOD (36000-105000 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...MOSTLY CLEAR. LOWS IN THE LOWER 40S. WINDS
GENERALLY LESS THAN 10 MPH.
.THURSDAY...MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.
.FRIDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER
50S. WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MCDONALD
REQUESTED BY...LAURA DOOLEY
REASON FOR REQUEST...WILDFIRE
.TAG 20090908.BUTTE.01/RIW