FNUS75 KRIW 262154
FWSRIW

SPOT FORECAST FOR FONTENELLE FIRE...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
354 PM MDT TUE JUN 26 2012

FORECAST IS BASED ON REQUEST TIME OF 1529 MDT ON JUNE 26.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT UNTIL 10 PM MDT THURSDAY...

.DISCUSSION...

CRITICAL FIRE WEATHER CONDITIONS ARE POSSIBLE THROUGH FRIDAY WITH
THE MOST EXTREME CONDITIONS EXPECTED TO END THIS EVENING ONCE A DRY
COLD FRONT PASSES THROUGH...BETWEEN 1800 AND 2000 WHEN WINDS WILL
SHIFT TO THE WEST AND LIGHTEN. SOUTHWEST FLOW RETURNS TOMORROW AS WINDS
PICK UP AGAIN AFTER SUNRISE...WITH 15 TO 25 MPH WINDS BY 1000 GUSTING
TO 35 MPH AFTER 1200...CONTINUING THROUGH 1800 AND THEN TAPERING OFF
AGAIN. SIMILAR CONDITIONS RETURNING ON THURSDAY WITH SLIGHTLY HIGHER
TEMPERATURES AND LOWER RHS...AFTER POOR RH RECOVERY OVERNIGHT WEDNESDAY
NIGHT.

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

FORECASTER...ALLEN

.TONIGHT...
SKY/WEATHER.........CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....35-39.
MAX HUMIDITY........54-57 PERCENT EXCEPT 35 TO 40 PERCENT AT MID SLOPE.
20 FOOT WINDS.......SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 35
                    MPH IN THE EVENING BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH.
RIDGE TOP WINDS.....SOUTHWEST AROUND 30 MPH DECREASING TO 10 TO 15 MPH
                    IN THE LATE EVENING AND OVERNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4700-5700 FT AGL DECREASING TO 1800-2800 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST AROUND 35 MPH BECOMING WEST AROUND 8
                    MPH LATE IN THE EVENING...THEN BECOMING LIGHT
                    AND VARIABLE AFTER MIDNIGHT.
SMOKE DISPERSAL.....VERY GOOD (125300 KNOT-FT) DECREASING TO POOR
                    (8200 KNOT-FT) AFTER MIDNIGHT.

.WEDNESDAY...
SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....72-76.
MIN HUMIDITY........10-13 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST 15
                    TO 25 MPH WITH GUSTS TO AROUND 30 MPH IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST AROUND 10 MPH INCREASING TO AROUND 30
                    MPH IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......3100-4100 FT AGL INCREASING TO 6900-7900 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....LIGHT AND VARIABLE WINDS BECOMING SOUTHWEST 32
                    TO 35 MPH.
SMOKE DISPERSAL.....GOOD (64500 KNOT-FT) INCREASING TO EXCELLENT
                    (182800 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY NIGHT...MOSTLY CLEAR. LOWS AROUND 40. WINDS GENERALLY
LESS THAN 10 MPH.
.THURSDAY...CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE MID
70S. SOUTHWEST WINDS 15 TO 25 MPH GUSTING TO 35 MPH.
.FRIDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE MID
70S. WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE
UPPER 70S. WINDS GENERALLY LESS THAN 10 MPH.
.SUNDAY...MOSTLY CLEAR. LOWS IN THE LOWER 40S. HIGHS AROUND 80.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...ALLEN
REQUESTED BY...TETON DISPATCH
REASON FOR REQUEST...WILDFIRE
.TAG 20120626.FONTE.01/RIW