FNUS75 KCYS 041500
FWSCYS

SPOT FORECAST FOR MARKING PEN RX...BLM
NATIONAL WEATHER SERVICE CHEYENNE WY
900 AM MDT WED MAY 4 2011

FORECAST IS BASED ON IGNITION TIME OF 0900 MDT ON MAY 04.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...AN UPPER LEVEL LOW PRESSURE SYSTEM WILL MOVE ACROSS
THE BURN AREA TODAY RESULTING IN COOLER TEMPERATURES AND SOME RAIN
OR SNOW SHOWERS. THE BEST CHANCE FOR SHOWERS IS EXPECTED TO BE
THIS MORNING INTO EARLY THIS AFTERNOON. THE LOW PRESSURE SYSTEM
WILL MOVE EAST OF THE AREA THIS EVENING WITH ANY LINGERING SHOWERS
ENDING AND SKIES CLEARING. DRY AND WARMER WEATHER WILL RETURN
THURSDAY AS A RIDGE OF HIGH PRESSURE MOVES ACROSS THE AREA WITH
SOME BREEZINESS IN THE AFTERNOON.

.TODAY...

SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). SCATTERED RAIN
                    OR SNOW SHOWERS THIS MORNING WITH A CHANCE FOR
                    SHOWERS MAINLY INTO THIS AFTERNOON.

MAX TEMPERATURE.....AROUND 45.
MIN HUMIDITY........54 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY 3-6 MPH BECOMING WEST-NORTHWEST
                    12 TO 15 MPH AROUND 11 A.M.
CWR.................10 PERCENT.
LAL.................1.
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......6200 FT AGL INCREASING TO 8200 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....NORTHWEST AROUND 14 MPH.
SMOKE DISPERSAL.....EXCELLENT (61800-114800 KNOT-FT).

.TONIGHT...

SKY/WEATHER.........CLEARING THIS EVENING (15-25 PERCENT).
MIN TEMPERATURE.....AROUND 26.
MAX HUMIDITY........88 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 8 TO 10 MPH EARLY IN THE
                    EVENING BECOMING DOWNSLOPE/DOWNVALLEY 4-7
                    MPH...THEN BECOMING WEST 8 TO 9 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.......4300 FT AGL DECREASING TO 600 FT AGL AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....WEST AROUND 8 MPH.
SMOKE DISPERSAL.....BECOMING POOR BY 9 PM (56400-4900 KNOT-FT).

.THURSDAY...

SKY/WEATHER.........SUNNY (0-10 PERCENT).
MAX TEMPERATURE.....AROUND 58.
MIN HUMIDITY........24 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 8 MPH INCREASING TO 17
                    TO 21 MPH WITH GUSTS TO AROUND 30 MPH BY 11AM.
CWR.................0 PERCENT.
LAL.................1.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......4100 FT AGL INCREASING TO 7600 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 24 MPH.
SMOKE DISPERSAL.....GOOD TO EXCELLENT (53000-194500 KNOT-FT).

$$
FORECASTER...EMANUEL
REQUESTED BY...KIRK STROM
TYPE OF REQUEST...PRESCRIBED
.TAG 20110504.MARKI.01/CYS