FNUS75 KRIW 200209
FWSRIW

SPOT FORECAST FOR SHOAL...USFS BTF
NATIONAL WEATHER SERVICE RIVERTON WY
809 PM MDT SAT SEP 19 2009

FORECAST IS BASED ON REQUEST TIME OF 1940 MDT ON SEPTEMBER 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...RADAR SHOWED ONE LAST ISOLATED SHOWER NEAR THE
HOBACK JUNCTION AT 1950 FOLLOWED BY A SMALL AREA OF CLEARING OVER
SOUTHEAST IDAHO. THUS...EXPECT A PERIOD OF CLEARING LATE THIS
EVENING BEFORE HIGH CLOUDS INCREASE AROUND MIDNIGHT.  A WEAK FRONT
WILL PUSH SOUTH ACROSS EASTERN IDAHO OVERNIGHT...GENERATING A FEW
SHOWERS AND POSSIBLY A FEW HUNDREDTHS OF RAINFALL OVER THE FIRE THROUGH
SUNDAY MORNING. A STRONGER COLD FRONT WILL PUSH THROUGH THE AREA
AROUND NOON SUNDAY USHERING IN GUSTY WEST WIND ALONG WITH A DRIER
COOLER AIRMASS AND CLEARING SKIES.

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

FORECASTER...MEUNIER

.TONIGHT...
SKY/WEATHER.........MOSTLY CLEAR TO PARTLY CLOUDY WITH AN ISOLATED
                    SHOWER EARLY.  BECOMING MOSTLY CLOUDY BY MIDNIGHT
                    WITH ISOLATED SHOWERS REDEVELOPING.
MIN TEMPERATURE.....42-46.
MAX HUMIDITY........71-74 PERCENT.
20 FOOT WINDS.......LIGHT AND VARIABLE...BECOMING DOWNSLOPE NORTHEAST
                    AROUND 5 MPH AFTER MIDNIGHT.  ERRATIC GUSTS
                    TO 25 MPH POSSIBLE NEAR SHOWERS EARLY...THROUGH 2030.
RIDGE TOP WINDS.....WEST 10 TO 15 MPH.
LAL.................1.
CHC OF WETTING RAIN.5 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE
GROWTH.
MIXING HEIGHT.......1600-2600 FT AGL.
TRANSPORT WINDS.....WEST 12 TO 18 MPH.
SMOKE DISPERSAL.....POOR TO FAIR (15000-40300 KNOT-FT).

.SUNDAY...
SKY/WEATHER.........MOSTLY CLOUDY (60-70 PERCENT WITH SCATTERED
                    SHOWERS IN THE MORNING.  RAPID CLEARING OCCURRING
                    AROUND NOON AFTER FRONTAL PASSAGE.
MAX TEMPERATURE.....55-58.
MIN HUMIDITY........27-30 PERCENT.
20 FOOT WINDS.......UPSLOPE/UPVALLEY OR WEST SOUTHWEST 5-9 MPH BECOMING
                    WEST 13 TO 17 MPH WITH GUSTS TO AROUND 30 MPH IN THE
                    AFTERNOON.
RIDGE TOP WINDS.....WEST 15 TO 20 MPH INCREASING TO AROUND 25 MPH
                    LATE IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.11 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3000 FT AGL INCREASING TO 5800 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....WEST 15 TO 22 MPH INCREASING TO AROUND 26 MPH
                    LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (40900 KNOT-FT) INCREASING TO VERY GOOD
                    (122200 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY NIGHT...COLDER. PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS
AND SNOW SHOWERS IN THE EVENING. LOWS IN THE UPPER 20S. NORTHWEST
WINDS AROUND 13 MPH.
.MONDAY...MOSTLY CLEAR. LOWS IN THE UPPER 20S. HIGHS IN THE UPPER
40S. WINDS GENERALLY LESS THAN 10 MPH.
.TUESDAY...WARMER. MOSTLY CLEAR. LOWS IN THE LOWER 30S. HIGHS IN
THE LOWER 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.
.THURSDAY...MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE MID
60S. WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...MEUNIER
REQUESTED BY...LANCASTER
REASON FOR REQUEST...WILDFIRE
.TAG 20090919.SHOAL.01/RIW