FNUS75 KCYS 281629
FWSCYS

SPOT FORECAST FOR MARKING PEN CREEK PRESCRIBED BURN...BLM
NATIONAL WEATHER SERVICE CHEYENNE WY
1029 AM MDT THU APR 28 2011

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON APRIL 28.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
SOME HIGH CLOUDS WILL MOVE ACROSS THE AREA TODAY AND TONIGHT BUT
DRY CONDITIONS WILL CONTINUE TODAY AND TONIGHT. A BREEZY WEST-
SOUTHWEST WIND WILL OCCUR TODAY BEFORE EASING SOME TONIGHT.
CLOUDS WILL INCREASE TONIGHT WITH MOSTLY CLOUDY AND COOLER
CONDITIONS FRIDAY BEHIND A COOL FRONT WHICH IS EXPECTED TO PASS
ACROSS AROUND MID-MORNING FRIDAY. A DECENT CHANCE FOR SNOW SHOWERS
WILL EXIST FRIDAY ALONG WITH BREEZY WESTERLY WINDS ONCE AGAIN.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....AROUND 53.
MIN HUMIDITY........23 PERCENT.
WIND (20 FT)........BREEZY. SOUTHWEST WINDS 14 TO 25 MPH. GUSTS UP
                    TO 30 MPH INCREASING TO 40 MPH IN THE
                    AFTERNOON.
CWR.................0 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......6000 FT AGL INCREASING TO 8400 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 28 MPH.
SMOKE DISPERSAL.....EXCELLENT (102100-278200 KNOT-FT).

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT) THEN BECOMING
                    CLOUDY (80-90 PERCENT). CHANCE OF SNOW SHOWERS
                    AND RAIN SHOWERS AFTER MIDNIGHT.
MIN TEMPERATURE.....AROUND 34.
MAX HUMIDITY........78 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 12 TO 23 MPH WITH GUSTS TO
                    AROUND 30 MPH DECREASING TO 10 TO 15 MPH
CWR.................10 PERCENT INCREASING TO 30 PERCENT AFTER
                    MIDNIGHT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......800-2200 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH.
SMOKE DISPERSAL.....BECOMING POOR BY 10 PM (61700-10100 KNOT-FT).

.FRIDAY...

SKY/WEATHER.........CLOUDY (85-95 PERCENT). SNOW SHOWERS LIKELY
                    THROUGH THE DAY.
MAX TEMPERATURE.....AROUND 38.
MIN HUMIDITY........50 PERCENT.
WIND (20 FT)........WEST WINDS 14 TO 21 MPH. GUSTS UP TO 35 MPH
                    INCREASING TO 40 MPH LATE IN THE AFTERNOON.
CWR.................60 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1200 FT AGL INCREASING TO 7900 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....WEST AROUND 24 MPH.
SMOKE DISPERSAL.....FAIR TO EXCELLENT (20700-203500 KNOT-FT).

$$
FORECASTER...EMANUEL
REQUESTED BY...CHRIS OTTO
TYPE OF REQUEST...PRESCRIBED
.TAG 20110428.MARKI.01/CYS