FNUS75 KCYS 061725
FWSCYS

SPOT FORECAST FOR WEST BARRETTS RX...BLM
NATIONAL WEATHER SERVICE CHEYENNE WY
1125 AM MDT THU MAY 6 2010

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON MAY 07.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A STORM SYSTEM OVER FAR SOUTHERN MONTANA LATE THIS
MORNING WILL CONTINUE TO MOVE TO THE NORTHEAST THROUGH FRIDAY.
DRIER AIR AND LESS WINDY CONDITIONS WILL SPREAD OVER THE BURN SITE
BY FRIDAY AS THE STORM SYSTEM DEPARTS.  SURFACE HIGH PRESSURE WILL
MOVE OVER THE CENTRAL NORTHERN ROCKIES ON FRIDAY.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT).
MIN TEMPERATURE.....AROUND 20.
MAX HUMIDITY........84 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 8 TO 18 MPH WITH GUSTS TO
                    AROUND 35 MPH UNTIL EARLY MORNING.  THEN
                    BECOMING DOWNSLOPE/DOWNVALLEY 4-7 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......6000 FEET AGL AT SUNSET...LOWERING TO BETWEEN
                    1000 AND 2000 FEET AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....NORTHWEST AROUND 20 MPH IN THE EVENING...THEN
                    DOWNSLOPE OR DOWNVALLEY 5 TO 10 MPH AFTER
                    MIDNIGHT.
SMOKE DISPERSAL.....GOOD IN THE EVENING...THEN BECOMING POOR AFTER
                    MIDNIGHT.

.FRIDAY...

SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT).
MAX TEMPERATURE.....39-44.
MIN HUMIDITY........28-34 PERCENT.
WIND (20 FT)........NORTHWEST 12 TO 18 MPH BY MID MORNING WITH GUSTS
                    TO 25 MPH.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1000 TO 2000 FEET AGL EARLY...THEN INCREASING TO
                    BETWEEN 7000 AND 8000 FEET AGL IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST INCREASING TO 15 TO 20 MPH BY THE
                    AFTERNOON.
SMOKE DISPERSAL.....POOR EARLY...THE BECOMING VERY GOOD IN THE
                    AFTERNOON.

$$
FORECASTER...WEILAND
REQUESTED BY...HANS PEDERSON
TYPE OF REQUEST...PRESCRIBED
.TAG 20100507.WESTB.01/CYS