FNUS75 KCYS 082021
FWSCYS

SPOT FORECAST FOR ILLINOIS CREEK...USFS
NATIONAL WEATHER SERVICE CHEYENNE WY
221 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.

.REST OF TODAY...

SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SCATTERED
                    SHOWERS AND THUNDERSTORMS.
MAX TEMPERATURE.....AROUND 66.
MIN HUMIDITY........34 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 15 TO 17 MPH WITH HIGHER GUSTS IN
                    OPEN AREAS.
                    WINDS IN SHELTERED AREAS...UPSLOPE/UPVALLEY AT
                    4 TO 7 MPH WITH GUSTS TO 10 MPH.
CWR.................40 PERCENT.
LAL.................3.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......8000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 25 MPH.
SMOKE DISPERSAL.....EXCELLENT TO EXCELLENT (168800-176800 KNOT-FT).

TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
                    PARTLY CLOUDY (45-55 PERCENT). SCATTERED RAIN
                    SHOWERS IN THE EVENING.
MIN TEMPERATURE.....AROUND 42.
MAX HUMIDITY........86 PERCENT.
WIND (20 FT)........BECOMING DOWNSLOPE/DOWNVALLEY 4-7
                    MPH THIS EVENING...THEN BECOMING SOUTHWEST
                    AROUND 8 MPH LATE IN THE NIGHT.
CWR.................30 PERCENT DECREASING TO 10 PERCENT AFTER
                    MIDNIGHT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......4100 FT AGL DECREASING TO 300 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....SOUTH AROUND 17 MPH.
SMOKE DISPERSAL.....FAIR (3800-94500 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 AT  5 TO 10 MPH WITH GUSTS UP TO 14 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).

$$
FORECASTER...DAUGHERTY
REQUESTED BY...BONENBERGER
TYPE OF REQUEST...WILDFIRE
.TAG 20100908.ILLIN.02/CY