FNUS75 KRIW 301431
FWSRIW

SPOT FORECAST FOR SLEEPING GIANT PILES...USFS SHF
NATIONAL WEATHER SERVICE RIVERTON WY
831 AM MDT WED SEP 30 2009

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON SEPTEMBER 30.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MDT THIS
EVENING...

.DISCUSSION...

WIDESPREAD SHOWERS ASSOCIATED WITH THE ADVANCEMENT OF A STRONG
TROUGH WILL CONTINUE TODAY. THE PASSAGE OF A COLD FRONT THROUGH
THE BURN SITE EARLIER THIS MORNING WILL ALLOW TEMPERATURES TO
CONTINUE TO COOL THIS MORNING. THESE COOLER TEMPERATURES WILL CONVERT
ANY REMAINING RAINFALL TO SNOWFALL LATE THIS MORNING. STRONGER
WIND CURRENTLY OVER THE BURN SITE WILL WEAKEN SLIGHTLY THROUGH
THE MORNING...THOUGH GUSTS TO 20 TO 25 WILL REMAIN. SNOWFALL WILL
THEN CONTINUE THROUGH THE EVENING AND OVERNIGHT HOURS. BETWEEN 5
AND 6 INCHES OF SNOWFALL EXPECTED OVER THE BURN SITE BY THURSDAY
MORNING. THE MAJORITY OF THIS SNOWFALL IS EXPECTED TO FALL OVER
THE BURN SITE BETWEEN 1200 AND 2400 TODAY. THE AXIS OF THE TROUGH
WILL PASS THROUGH THE FIRE DURING THE EVENING HOURS TONIGHT...WITH
IMPROVING CONDITIONS EXPECTED THURSDAY MORNING AND AFTERNOON. SNOW
SHOWERS WILL REMAIN POSSIBLE...THOUGH COVERAGE WILL DECREASE TO
ISOLATED AFTER 1200 THURSDAY. COOLER TEMPERATURES AND ELEVATED
HUMIDITY WILL LINGER THROUGH THURSDAY.


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

FORECASTER...BRANHAM

.TODAY...
SKY/WEATHER.........CLOUDY (95-100 PERCENT). RAIN SHOWERS IN THE
                    MORNING. RAIN AND SNOW MIXED SHOWERS EXPECTED
                    AFTER 1000...THEN SNOW SHOWERS EXPECTED AFTER
                    1200.
MAX TEMPERATURE.....43-46.
MIN HUMIDITY........55-60 PERCENT.
20 FOOT WINDS.......NORTHWEST 10 TO 15 MPH WITH GUSTS OF 25 TO
                    30 MPH.
RIDGE TOP WINDS.....NORTHWEST 15 TO 20 MPH INCREASING TO 20 TO 25
                    MPH AFTER 1600.
LAL.................1.
CHC OF WETTING RAIN.100 PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO AROUND 3700 FT AGL BY 1200.
TRANSPORT WINDS.....NORTHWEST 15 TO 20 MPH...INCREASING TO 25 TO
                    30 MPH AFTER 1600.
SMOKE DISPERSAL.....POOR TO GOOD (35500-71000 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........CLOUDY (95-100 PERCENT). SNOW SHOWERS
                    THROUGH THE NIGHT.
MIN TEMPERATURE.....20-25.
MAX HUMIDITY........86-90 PERCENT.
20 FOOT WINDS.......NORTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO
                    AROUND 25 MPH.
RIDGE TOP WINDS.....NORTHWEST 15 TO 20 MPH.
LAL.................1.
CHC OF WETTING RAIN.89 PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO 1800 FT AGL AFTER 0200.
TRANSPORT WINDS.....NORTHWEST 22 TO 27 MPH.
SMOKE DISPERSAL.....POOR TO GOOD (35600-61200 KNOT-FT).

.THURSDAY...
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (50-60 PERCENT). CHANCE OF SNOW
                    SHOWERS IN THE MORNING...THEN SLIGHT CHANCE OF
                    SNOW SHOWERS AFTER 1300.
MAX TEMPERATURE.....39-43.
MIN HUMIDITY........41-46 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING WEST
                    NORTHWEST 12 TO 15 MPH WITH GUSTS TO AROUND
                    30 MPH AFTER 1300.
RIDGE TOP WINDS.....NORTHWEST 15 TO 20 MPH INCREASING TO AROUND
                    25 MPH BY 1500.
LAL.................1.
CHC OF WETTING RAIN.LESS THAN 5 PERCENT.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......INCREASING TO 4400 FT AGL BY 1400.
TRANSPORT WINDS.....NORTHWEST 20 TO 25...BECOMING WEST NORTHWEST
                    AT 25 TO 30 MPH BY 1500.
SMOKE DISPERSAL.....FAIR (44300 KNOT-FT) INCREASING TO VERY GOOD
                    (101900 KNOT-FT) BY 1500.

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY NIGHT...PARTLY CLOUDY. LOWS AROUND 20. WEST WINDS
AROUND 11 MPH.
.FRIDAY...PARTLY CLOUDY. LOWS IN THE MID 20S. HIGHS IN THE MID
40S. WINDS GENERALLY LESS THAN 10 MPH.
.SATURDAY...MOSTLY CLOUDY WITH CHANCE OF SHOWERS AND SNOW
SHOWERS. LOWS IN THE UPPER 20S. HIGHS IN THE UPPER 40S. WINDS
GENERALLY LESS THAN 10 MPH.
.SUNDAY...COLDER. RAIN AND SNOW LIKELY. LOWS IN THE MID 20S.
HIGHS IN THE MID 30S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...BRANHAM
REQUESTED BY...CLINT DAWSON
REASON FOR REQUEST...PRESCRIBED
.TAG 20090930.SLEEP.01/RIW