FNUS75 KRIW 121756
FWSRIW

SPOT FORECAST FOR FONTENELLE...WY-BTF
NATIONAL WEATHER SERVICE RIVERTON WY
1156 AM MDT SUN AUG 12 2012

FORECAST IS BASED ON REQUEST TIME OF 1128 MDT ON AUGUST 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

A SWATH OF DRY AIR WILL CONTINUE TO PUSH INTO THE AREA...THERE WILL
BE POOR RH RECOVERY OVERNIGHT AND CONTINUED LOW RH THROUGH WEDNESDAY.
FLOW WILL BE LIGHT FROM THE WEST THROUGH TOMORROW WITH A FEW GUSTS
AROUND 20 TO 25 MPH DURING PEAK HEATING ON MONDAY AFTERNOON...
INCREASING ON TUESDAY AND WEDNESDAY AS A WEATHER SYSTEM APPROACHES
WEDNESDAY NIGHT...WITH GUSTS OVER 25 MPH LIKELY.

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

FORECASTER...ALLEN

.REST OF TODAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....72-78.
MIN HUMIDITY........15-19 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....WEST AROUND 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......10200-11200 FT AGL.
TRANSPORT WINDS.....WEST AROUND 15 MPH.
SMOKE DISPERSAL.....VERY GOOD (119100 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).
MIN TEMPERATURE.....35-39...45-50 AT MID SLOPE.
MAX HUMIDITY........50-60 PERCENT...25 TO 35 PERCENT AT MID SLOPE.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH. GUSTS UP TO 15 MPH
                    UNTIL 2100.
RIDGE TOP WINDS.....WEST 5 TO 10 MPH BECOMING NORTH AFTER 2300.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE
                    GROWTH.
MIXING HEIGHT.......10600-11600 FT AGL DECREASING TO 5400-6400 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST 9 TO 14 MPH BECOMING NORTH 5 TO 10 MPH
                    AFTER 2300.
SMOKE DISPERSAL.....VERY GOOD (124700 KNOT-FT) DECREASING TO
                    FAIR (54300 KNOT-FT) AFTER MIDNIGHT.

.MONDAY...
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (35-45 PERCENT).
MAX TEMPERATURE.....72-78.
MIN HUMIDITY........14-18 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING WEST 10 TO 14
                    MPH WITH GUSTS TO AROUND 25 MPH IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....WEST 10 TO 15 MPH INCREASING TO AROUND 25 MPH
                    LATE IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5400-6400 FT AGL INCREASING TO 9400-10400 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 12 TO 21 MPH.
SMOKE DISPERSAL.....GOOD (68900 KNOT-FT) INCREASING TO EXCELLENT
                    (160200 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.MONDAY NIGHT...MOSTLY CLEAR. LOWS IN THE MID 40S. WEST WINDS
AROUND 10 MPH.
.TUESDAY...PARTLY CLOUDY. LOWS IN THE MID 40S. HIGHS IN THE MID
70S. WEST WINDS AROUND 12 MPH GUSTING AROUND 25 MPH AFTER 1200.
.WEDNESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER
70S. WEST WINDS 10 TO 20 MPH.
.THURSDAY...COOLER. MOSTLY CLEAR. LOWS AROUND 40. HIGHS IN THE
UPPER 60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...ALLEN
REQUESTED BY...FONTENELLE IC
REASON FOR REQUEST...WILDFIRE
.TAG 20120812.FONTE.02/RIW