FNUS75 KCYS 082235
FWSCYS

SPOT FORECAST FOR ILLINOIS CREEK...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
435 PM MDT WED SEP 8 2010

FORECAST IS BASED ON REQUEST TIME OF 1341 MDT ON SEPTEMBER 08.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...ISOLATED THUNDERSTORMS WILL OCCUR ACROSS THE FIRE AREA
FROM THIS AFTERNOON INTO EARLY EVENING.  THE MAIN THREAT WITH THE
STORMS WILL BE GUSTY WINDS UP TO 45 MPH.  WINDY CONDITIONS WILL
CONTINUE OVERNIGHT AND THROUGH THURSDAY AS AN UPPER TROUGH AND
COLD FRONT APPROACH THE AREA. WINDS WILL NOT BE AS STRONG IN
SHELTERED AREAS. THE COLD FRONT WILL MOVE THROUGH THE FIRE AREA
LATE THUR NIGHT. THE GENERAL WINDS WILL SHIFT FROM THE SOUTHWEST
TO THE WEST TO NORTHWEST BY EARLY FRI MORNING AND WILL CONTINUE TO
BE GUSTY. NOT MUCH PRECIPITATION IS EXPECTED WITH THIS SYSTEM.


.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (45-55 PERCENT). ISOLATED
                    THUNDERSTORMS EARLY IN THE EVENING. SCATTERED
                    RAIN SHOWERS IN THE EVENING.
MIN TEMPERATURE.....AROUND 42.
MAX HUMIDITY........86 PERCENT.
WIND (20 FT)........BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH...THEN
                    BECOMING SOUTHWEST AROUND 8 MPH LATE IN THE NIGHT.
CWR.................40 PERCENT DECREASING TO 10 PERCENT AFTER
                    MIDNIGHT.
LAL.................2 UNTIL 1800...THEN 1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4000 FT AGL DECREASING TO 300 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 17 TO 25 MPH.
SMOKE DISPERSAL.....FAIR (3800-176800 KNOT-FT).

.THURSDAY...

SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (55-65 PERCENT).
MAX TEMPERATURE.....AROUND 64.
MIN HUMIDITY........27 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 10 TO 17 MPH. GUSTS UP TO 25
                    TO 30 MPH IN OPEN AREAS. IN SHELTERED AREAS...
                    UPSLOPE/UPVALLEY 5 TO 10 MPH WITH OCCASIONAL
                    GUSTS TO 15 MPH.
CWR.................10 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3800 FT AGL INCREASING TO 7400 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 24 MPH.
SMOKE DISPERSAL.....GOOD TO EXCELLENT (57800-178100 KNOT-FT).

.THURSDAY NIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS.
MIN TEMPERATURE.....AROUND 44 DEGREES.
MAX HUMIDITY........55 TO 70 PERCENT.
WIND (20 FT)........BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH.
CWR.................5 PERCENT.
LAL.................1.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......6000 FT AGL DECREASING TO 500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 10 TO 20 MPH.
SMOKE DISPERSAL.....POOR (1400-71200 KNOT-FT).

$$
FORECASTER...TRUDEL
REQUESTED BY...BONENBERGER
TYPE OF REQUEST...WILDFIRE
.TAG 20100908.ILLIN.02/CYS