FNUS75 KCYS 201230 CCA
FWSCYS

SPOT FORECAST FOR COTTONWOOD FIRE...HARRISON FIRE DEPT
NATIONAL WEATHER SERVICE CHEYENNE WY
625 AM MDT WED JUN 20 2012

FORECAST IS BASED ON REQUEST TIME OF 0609 MDT ON JUNE 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

NORTH TO NORTHWESTERLY WINDS TO CONTINUE THIS MORNING. HIGH PRESSURE
OVER MONTANA WILL CONTINUE TO MOVE SOUTHEAST INTO NORTH CENTRAL WYOMING
THROUGH THE DAY. THERE ARE SOME THUNDER SHOWERS NEAR CASPER THAT ARE
MOVING TOWARDS THE FIRE THIS MORNING. A FEW OF THEM COULD REACH THE
BURN SITE BY 830 AM. ERRATIC DOWNBURST WINDS...SOME CLOUD TO GROUND
LIGHTNING AND LIGHT RAIN SHOWERS WILL BE ASSOCIATED WITH THESE
STORMS.

.TODAY...

SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING
                    MOSTLY SUNNY (25-35 PERCENT). SLIGHT CHANCE OF
                    SHOWERS AND THUNDERSTORMS IN THE MORNING.
MAX TEMPERATURE.....AROUND 70.
MIN HUMIDITY........32 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 10 MPH THIS MORNING.
                    INCREASING TO 10 TO 15 MPH WITH GUSTS TO 25 MPH
                    AFTER 9 AM.
CWR.................20 PERCENT DECREASING TO 0 PERCENT IN THE
                    AFTERNOON.
LAL.................2.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......8400 FT AGL INCREASING TO 10800 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHWEST AROUND 18 MPH.
SMOKE DISPERSAL.....EXCELLENT (89800-191200 KNOT-FT).

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
MIN TEMPERATURE.....AROUND 51.
MAX HUMIDITY........61 PERCENT.
WIND (20 FT)........NORTH WINDS 5 TO 12 MPH IN THE EVENING BECOMING
                    LIGHT...THEN BECOMING WEST 5 TO 6 MPH EARLY IN
                    THE MORNING.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......5500 FT AGL DECREASING TO 300 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....NORTHWEST AROUND 9 MPH.
SMOKE DISPERSAL.....EXCELLENT TO POOR (81000-1500 KNOT-FT).

$$
FORECASTER...CLAYCOMB
REQUESTED BY...JW GEISER
TYPE OF REQUEST...WILDFIRE
.TAG 20120620.COTTO.01/CYS