FNUS75 KRIW 231125
FWSRIW

SPOT FORECAST FOR SINKS CANYON TEST...USFS SHF
NATIONAL WEATHER SERVICE RIVERTON WY
525 AM MDT THU JUL 23 2009

FORECAST IS BASED ON REQUEST TIME OF 0501 MDT ON JULY 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...TODAY IS EXPECTED TO BE A DRY AND VERY WARM DAY WITH
WINDS GENERALLY DRIVEN BY THE DIURNAL CYCLE. AN ISOLATED THUNDERSTORM
IS POSSIBLE OVER THE HIGHER MOUNTAINS BUT THEY ARE NOT EXPECTED TO
MAKE IT INTO THE FOOTHILLS. SHOWERS AND THUNDERSTORMS ARE EXPECTED
TO MOVE INTO THE AREA AS EARLY AS FRIDAY MORNING AND CONTINUE THROUGH
THE AFTERNOON. GUSTY WINDS OVER 40 MPH AND CLOUD TO GROUND LIGHTNING
WILL BE THE MAIN RISK WITH THESE STORMS.


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

FORECASTER...SKRBAC

.TODAY...
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (35-45 PERCENT).
MAX TEMPERATURE.....84-88.
MIN HUMIDITY........13-16 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 5-9 MPH...BECOMING
                    UPSLOPE/UPVALLEY 5-9 MPH BETWEEN 0900-1000.
RIDGE TOP WINDS.....WEST TO NORTHWEST 6 TO 12 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......6500 FT AGL INCREASING TO 14000 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
SMOKE DISPERSAL.....GOOD (65000 KNOT-FT) INCREASING TO VERY GOOD (140000
                    KNOT-FT) IN THE AFTERNOON.

.TONIGHT...
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
MIN TEMPERATURE.....AROUND 58-62.
MAX HUMIDITY........44-47 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 6-10 MPH.
RIDGE TOP WINDS.....NORTHWEST 6 TO 12 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......6300 FT AGL DECREASING TO 2000 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTHWEST 6 TO 9 MPH.
SMOKE DISPERSAL.....FAIR...BECOMING POOR AFTER MIDNIGHT.
                    (15000-48000 KNOT-FT).

.FRIDAY...
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT)...BECOMING MOSTLY
                    CLOUDY (65-75 PERCENT) IN THE AFTERNOON. ISOLATED
                    SHOWERS AND THUNDERSTORMS AFTER 1000L...BECOMING
                    SCATTERED SHOWERS AND THUNDERSTORMS AFTER 1400L.
                    THUNDERSTORMS WILL BE CAPABLE OF PRODUCING STRONG
                    AND ERRATIC WIND GUSTS OVER 40 MPH ALONG WITH
                    DANGEROUS LIGHTNING.
MAX TEMPERATURE.....82-85.
MIN HUMIDITY........15-20 PERCENT.
20 FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 6 TO 10 MPH...BECOMING
                    UPSLOPE/UPVALLEY 6-10 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....NORTHWEST 5 TO 10 MPH.
LAL.................1 UNTIL 1000...THEN 2...INCREASING TO 4 AFTER 1400L.
CHC OF WETTING RAIN.20 PERCENT IN THE AFTERNOON.
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5100 FT AGL INCREASING TO 9800 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHWEST AROUND 10 MPH.
SMOKE DISPERSAL.....FAIR (51000 KNOT-FT) INCREASING TO GOOD
                    (98000 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY NIGHT...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 50S. WINDS GENERALLY LESS THAN
10 MPH.
.SATURDAY...PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 50S. HIGHS IN THE UPPER 70S. WINDS
GENERALLY LESS THAN 10 MPH.
.SUNDAY...PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE LOWER 50S. HIGHS IN THE UPPER 70S. WINDS GENERALLY
LESS THAN 10 MPH.
.MONDAY...MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND THUNDERSTORMS.
LOWS IN THE LOWER 50S. HIGHS AROUND 70. WINDS GENERALLY LESS THAN
10 MPH.

$$

FORECASTER...SKRBAC
REQUESTED BY...ROCKY MCWILLIAMS
REASON FOR REQUEST...WILDFIRE
.TAG 20090723.SINKS.01/RIW