FNUS75 KRIW 241244
FWSRIW

SPOT FORECAST FOR RED ROCK...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
644 AM MDT SAT SEP 24 2011

FORECAST IS BASED ON REQUEST TIME OF 0608 MDT ON SEPTEMBER 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A STRONG RIDGE OF HIGH PRESSURE WILL REMAIN OVER THE
NORTHERN ROCKIES TODAY ALONG WITH A WEAK SURFACE PRESSURE
GRADIENT. TEMPERATURES AND RELATIVE HUMIDITY WILL SHOW LITTLE
TREND FROM FRIDAY. A DRIER SOUTHWEST FLOW WILL PUSH IN SUNDAY
AHEAD OF A WEAK UPPER LEVEL DISTURBANCE. SOUTHWEST WIND WILL
INCREASE SUNDAY AFTERNOON WITH THIS DISTURBANCE BRINGING MAINLY
MID-LEVEL CLOUDS ACROSS THE AREA SUNDAY NIGHT INTO MONDAY
MORNING...ALONG WITH SLIGHTLY COOLER TEMPERATURES MONDAY.

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

FORECASTER...MEUNIER

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....70-75.
MIN HUMIDITY........17-21 PERCENT.
20 FOOT WINDS.......LIGHT AND VARIABLE AROUND 5 MPH THROUGH 1000...THEN
                    BECOMING UPVALLEY/UPSLOPE 5-10 MPH.
RIDGE TOP WINDS.....EAST 5-10 MPH SHIFTING TO THE SOUTHWEST
                    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.......BELOW 1000 FT AGL THROUGH 0900 INCREASING TO 7000 FT
                    AGL IN THE AFTERNOON.
TRANSPORT WINDS.....EAST 5 TO 10 MPH SHIFTING TO THE SOUTHWEST IN
                    THE AFTERNOON.
SMOKE DISPERSAL.....POOR THROUGH 0900...BECOMING FAIR IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....34-37.
MAX HUMIDITY........67-76 PERCENT.
20 FOOT WINDS.......BECOMING DOWNSLOPE/DOWNVALLEY OR EAST SOUTHEAST
                    4-7 MPH AFTER SUNSET.
RIDGE TOP WINDS.....SOUTH 5 TO 10 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4100-5100 FT AGL DECREASING TO BELOW 1000 FT AGL
                    AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.
SMOKE DISPERSAL.....FAIR UNTIL SUNSET...THEN POOR.

.SUNDAY...
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....70-75.
MIN HUMIDITY........16-20 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH. BECOMING WEST SOUTHWEST
                    10 TO 15 MPH WITH GUSTS 20 TO 25 MPH IN THE AFTERNOON.
RIDGE TOP WINDS.....SOUTHWEST 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......BELOW 1000 FT AGL THROUGH 0900...INCREASING
                    TO 8000-9000 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST  13 TO 18 MPH.
SMOKE DISPERSAL.....POOR INCREASING TO VERY GOOD IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY NIGHT...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AFTER
MIDNIGHT. LOWS IN THE UPPER 30S. WINDS GENERALLY LESS THAN
10 MPH.

.MONDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS IN
THE LOWER 30S. HIGHS IN THE LOWER 60S. WINDS GENERALLY LESS THAN
10 MPH.

.TUESDAY...MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.

.WEDNESDAY...MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...MARKASON
REASON FOR REQUEST...WILDFIRE
.TAG 20110924.REDRO.01/RIW