FNUS75 KRIW 261915
FWSRIW

SPOT FORECAST FOR CASTLE...USFS SHF
NATIONAL WEATHER SERVICE RIVERTON WY
115 PM MDT SAT SEP 26 2009

FORECAST IS BASED ON REQUEST TIME OF 1234 MDT ON SEPTEMBER 26.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING...

.DISCUSSION...A STRONG JET STREAM WILL MOVE INTO SOUTHWESTERN CANADA TODAY.
THE ASSOCIATED INCREASING WIND AT MOUNTAINTOP LEVEL AND ABOVE WILL
GRADUALLY MIX DOWN TO THE SURFACE THIS AFTERNOON AND EVENING. THE
INCREASING WIND WILL COMBINE WITH A VERY DRY AND WARM AIRMASS TO
CREATE RED FLAG CONDITIONS IN THE ABSAROKA MOUNTAINS THIS AFTERNOON
AND EARLY EVENING. A BACKDOOR COLD FRONT WILL BRING COOLER TEMPERATURES
ALONG WITH SLIGHTLY HIGHER RELATIVE HUMIDITY LEVELS TO THE AREA SUNDAY.
A STRONG UPPER LEVEL TROUGH IS EXPECTED TO BRING WIDESPREAD...
POSSIBLY SIGNIFICANT...SNOWFALL TO THE AREA WEDNESDAY.

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

FORECASTER...LIPSON

.REST OF TODAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....70.
MIN HUMIDITY........13 PERCENT.
20 FOOT WINDS.......WEST NORTHWEST 15 TO 17 MPH WITH GUSTS TO AROUND 30
                    MPH. WEST NORTHWEST WINDS INCREASING TO 20 TO 30 MPH WITH
                    GUSTS TO 35 MPH BY 1400.
RIDGE TOP WINDS.....WEST 25 TO 35 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......5300 FT AGL.
TRANSPORT WINDS.....WEST 24 TO 35 MPH.
SMOKE DISPERSAL.....VERY GOOD (110900 KNOT-FT).

.TONIGHT...
SKY/WEATHER.........CLEAR (0-10 PERCENT).
MIN TEMPERATURE.....33-36.
MAX HUMIDITY........62-65 PERCENT.
20 FOOT WINDS.......WEST NORTHWEST WINDS 20 TO 30 MPH. GUSTS UP TO 35 MPH
                    DECREASING TO 10 TO 20 MPH BY 2300 AND THEN TO
                    10 TO 15 MPH BY 0200.
RIDGE TOP WINDS.....WEST 20 TO 35 MPH.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......2100-3100 FT AGL.
TRANSPORT WINDS.....WEST 22 TO 36 MPH.
SMOKE DISPERSAL.....POOR TO GOOD (33400-76700 KNOT-FT).

.SUNDAY...
SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....65.
MIN HUMIDITY........16 PERCENT.
20 FOOT WINDS.......WEST NORTHWEST WINDS 10 TO 20 MPH WITH GUSTS TO AROUND 25
                    MPH...DECRASING TO 10 TO 15 MPH BY 1600.
RIDGE TOP WINDS.....WEST 15 TO 20 MPH INCREASING TO AROUND 25 MPH
                    IN THE AFTERNOON.
LAL.................1.
CHC OF WETTING RAIN.ZERO PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1800 FT AGL INCREASING TO 6100 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....WEST 16 TO 24 MPH.
SMOKE DISPERSAL.....POOR (27600 KNOT-FT) INCREASING TO VERY GOOD
                    (124000 KNOT-FT) IN THE AFTERNOON.

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY NIGHT...CLEAR. LOWS IN THE UPPER 20S. WINDS GENERALLY
LESS THAN 10 MPH.
.MONDAY...MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE MID
70S. SOUTHWEST WINDS AROUND 10 MPH.
.TUESDAY...MOSTLY CLOUDY. SCATTERED SHOWERS...SNOW SHOWERS AND
ISOLATED THUNDERSTORMS. LOWS IN THE LOWER 30S. HIGHS IN THE MID
60S. SOUTHWEST WINDS AROUND 12 MPH.
.WEDNESDAY...MUCH COLDER. SHOWERS...SNOW SHOWERS LIKELY AND
ISOLATED THUNDERSTORMS. LOWS AROUND 20. HIGHS IN THE MID 40S.
WINDS GENERALLY LESS THAN 10 MPH.

$$

FORECASTER...LIPSON
REQUESTED BY...CLINT DAWSON
REASON FOR REQUEST...WILDFIRE
.TAG 20090926.CASTL.01/RIW