FNUS75 KRIW 260042
FWSRIW

SPOT FORECAST FOR RED ROCK...TETON INTERAGENCY DISPATCH CENTER
NATIONAL WEATHER SERVICE RIVERTON WY
642 PM MDT THU AUG 25 2011

FORECAST IS BASED ON REQUEST TIME OF 1641 MDT ON AUGUST 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...AN UPPER LEVEL DISTURBANCE HAS PUSHED EAST OF THE
AREA THIS EVENING ALONG WITH THE MAIN LINE OF SHOWERS AND
THUNDERSTORMS. A DRIER AND MORE STABLE AIRMASS WAS PUSHING IN
BEHIND THIS FEATURE ACROSS WESTERN WYOMING. AN ISOLATED SHOWER
MAY STILL DEVELOP BEFORE 2000L...OTHERWISE LOOK FOR CLEARING SKIES
AND DECREASING WIND. ON SATURDAY...MONSOONAL MOISTURE WILL CONTINUE
TO ROTATE ACROSS THE AREA WITH ISOLATED SHOWERS AND THUNDERSTORMS
BLOSSOMING IN THE AFTERNOON AND EARLY EVENING. THIS ACTIVITY IS EXPECTED
TO BE WEAKER...LESS ORGANIZED THAN TODAY WITH THE LACK OF ANY SIGNIFICANT
UPPER LEVEL DISTURBANCES.

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

FORECASTER...MEUNIER

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (20-30 PERCENT) WITH AN ISOLATED
                    SHOWER POSSIBLE THROUGH 2000L...THEN CLEARING.
MIN TEMPERATURE.....45-48.
MAX HUMIDITY........71-74 PERCENT.
20 FOOT WINDS.......SOUTHWEST WINDS AROUND 8 TO 13 MPH WITH GUSTS TO
                    20 MPH THROUGH 2000L...DECREASING AND SHIFTING TO THE EAST
                    NORTHEAST 4TO 8 MPH BETWEEN 2000L AND 2200L.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH SHIFTING TO THE
                    SOUTHEAST 5 TO 10 MPH AFTER MIDNIGHT.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......6300-7300 FT AGL DECREASING TO 2900-3900 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST SOUTHWEST 15 TO 20 MPH BECOMING SOUTH 4 TO 8 MPH
                    AROUND MIDNIGHT.
SMOKE DISPERSAL.....GOOD (96300 KNOT-FT) DECREASING TO POOR (32400
                    KNOT-FT) AFTER MIDNIGHT.

.FRIDAY...
SKY/WEATHER.........MOSTLY SUNNY EARLY MORNING THEN BECOMING PARTLY CLOUDY
                    WITH ISOLATED SHOWERS AND THUNDERSTORMS AFTER 1100L.
MAX TEMPERATURE.....77-80
MIN HUMIDITY........21-24 PERCENT.
20 FOOT WINDS.......EAST NORTHEAST AROUND 5 MPH THROUGH 0900L...BECOMING
                    SOUTHWEST 8 TO 13 MPH WITH GUSTS TO 20 MPH AROUND
                    NOON.  GUSTY ERRATIC WINDS NEAR SHOWERS AND THUNDERSTORMS.
RIDGE TOP WINDS.....SOUTH 5 TO 10 MPH SHIFTING TO THE SOUTHWEST 15 TO 20 MPH
                    AROUND NOON.
LAL.................1 UNTIL 1100L...THEN 2.
CHC OF WETTING RAIN.3 PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2100-3100 FT AGL INCREASING TO 5800-6800 FT AGL
                    IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH SHIFTING TO THE
                    SOUTHWEST 15 TO 20 MPH IN THE LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....POOR THROUGH 1000L...INCREASING TO VERY GOOD IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...PARTLY CLOUDY WITH ISOLATED SHOWERS AND
THUNDERSTORMS. LOWS IN THE UPPER 40S. WINDS GENERALLY LESS THAN
10 MPH.
.SATURDAY...PARTLY CLOUDY WITH SCATTERED THUNDERSTORMS AND
SHOWERS. LOWS IN THE MID 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 MID 40S. HIGHS IN THE MID 70S. WINDS
GENERALLY LESS THAN 10 MPH.
.MONDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 40S. HIGHS IN THE MID 70S. WINDS
GENERALLY LESS THAN 10 MPH.
.TUESDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 70S.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...DALLAS LOOKOUT
REASON FOR REQUEST...WILDFIRE
.TAG 20110825.REDRO.01/RIW