FNUS75 KRIW 221718
FWSRIW

SPOT FORECAST FOR SINKS CANYON...IA CDC
NATIONAL WEATHER SERVICE RIVERTON WY
1018 AM MST SUN FEB 22 2009

FORECAST IS BASED ON REQUEST TIME OF 0946 MST ON FEBRUARY 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
RIDGE OF HIGH PRESSURE WILL KEEP WARMER TEMPERATURES AND GENERALLY
LIGHTER WINDS OVER THE FIRE THIS AFTERNOON. WINDS NOT EXPECTED TO
EXCEED 10 MPH...AND SHOULD GENERALLY REMAIN UPSLOPE. TEMPERATURES
EXPECTED TO WARM TO THE UPPER 40S TODAY...WITH HUMIDITY DECREASING
INTO THE 20 PERCENT RANGE DUE TO THE DRY RIDGING PATTERN. THIS
PATTERN WILL CONTINUE INTO THE EVENING HOURS TONIGHT. AN APPROACHING
UPPER LEVEL DISTURBANCE WILL IMPACT THE FIRE TONIGHT. WINDS WILL
INCREASE WITH THE ARRIVAL OF THIS SYSTEM...AND WILL HAVE A
SOUTHWEST COMPONENT THROUGH THE CANYON. EXPECT WINDS TO INCREASE
TO AROUND 10 TO 15 MPH DURING THE LATE EVENING HOURS
TONIGHT...THOUGH WILL DECREASE TO DOWNSLOPE/DOWNVALLEY DURING THE
EARLY MORNING HOURS. WINDS EXPECTED TO AGAIN INCREASE TO 10 TO 15
MPH LATE MONDAY MORNING. ADDITIONALLY...THIS SYSTEM WILL PUSH
INCREASED CLOUD COVER OVER THE FIRE OVERNIGHT...WITH SNOW ACTIVITY
POSSIBLE DURING THE LATE OVERNIGHT AND EARLY MORNING HOURS OF
MONDAY...AND ARE ANTICIPATED TO CONVERT TO RAINFALL DURING THE
LATE MORNING...EARLY AFTERNOON HOURS. SIMILAR TEMPERATURES
EXPECTED ON MONDAY...THOUGH HUMIDITIES WILL BE ELEVATED.

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

FORECASTER...BRANHAM

.TODAY...
SKY/WEATHER.........MOSTLY CLOUDY BECOMING PARTLY CLOUDY
                    (45-55 PERCENT) BY 1100...THEN INCREASING TO
                    MOSTLY CLOUDY BY 1400.
MAX TEMPERATURE.....43-47.
MIN HUMIDITY........25-30 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH.
RIDGE TOP WINDS.....WEST AT 10 TO 15 MPH.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 800 FT AGL BY 1300.
TRANSPORT WINDS.....NORTHWEST 14 TO 18 MPH.
SMOKE DISPERSAL.....POOR (6000-8700 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT).
MIN TEMPERATURE.....26-30.
MAX HUMIDITY........55-62 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 4-7 MPH BECOMING SOUTHWEST
                    AT 7 TO 10 MPH BY 0200. GUSTS UP TO 15
                    MPH AFTER 2200.
RIDGE TOP WINDS.....WEST AROUND 15 MPH.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......700 FT AGL.
TRANSPORT WINDS.....NORTHWEST 12 T0 17 MPH.
SMOKE DISPERSAL.....POOR (8400-8700 KNOT-FT).

.MONDAY...
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT). SLIGHT CHANCE OF
                    SNOW AFTER 0500...THEN CHANCE OF RAIN AND SNOW
                    MIX BY 1100...AND RAIN AFTER 1400.
MAX TEMPERATURE.....43-48.
MIN HUMIDITY........31-37 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING SOUTHWEST 12
                    TO 15 MPH WITH GUSTS TO AROUND 30 MPH BY 0900.
RIDGE TOP WINDS.....WEST 20 TO 25 MPH SHIFTING TO THE SOUTHWEST
                    AROUND 30 MPH BY 1200.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......700 FT AGL.
TRANSPORT WINDS.....NORTHWEST AROUND 18 MPH INCREASING TO AROUND 28
                    MPH AFTER 1200.
SMOKE DISPERSAL.....POOR (10900-16700 KNOT-FT).

.FORECAST DAYS 3 THROUGH 5...
.MONDAY NIGHT...MOSTLY CLOUDY WITH SLIGHT CHANCE OF SNOW. LOWS
AROUND 30. WEST WINDS AROUND 13 MPH.
.TUESDAY...MOSTLY CLOUDY WITH CHANCE OF RAIN AND SLIGHT CHANCE OF
SNOW. LOWS IN THE LOWER 20S. HIGHS IN THE LOWER 40S. WEST WINDS
AROUND 19 MPH.
.WEDNESDAY...CLOUDY WITH CHANCE OF RAIN AND SNOW. LOWS AROUND 20.
HIGHS AROUND 40. WEST WINDS AROUND 11 MPH.
.THURSDAY...MOSTLY CLOUDY WITH SLIGHT CHANCE OF RAIN AND SNOW.
LOWS AROUND 19. HIGHS IN THE UPPER 30S. WINDS GENERALLY LESS THAN
10 MPH.

$$

FORECASTER...BRANHAM
REQUESTED BY...CATHY HUTTON
REASON FOR REQUEST...WILDFIRE
.TAG 20090222.SINKS.01/RIW