FNUS75 KCYS 272318
FWSCYS

SPOT FORECAST FOR MARKING PEN CREEK PRESCRIBED BURN...BLM RAD
NATIONAL WEATHER SERVICE CHEYENNE WY
518 PM MDT WED APR 27 2011

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

.DISCUSSION...
BREEZY CONDITIONS WILL CONTINUE THROUGH AROUND 7 PM MDT THIS EVENING
AND THEN WINDS WILL DIMINISH TO LIGHT WIND SPEEDS THROUGH AROUND 10 AM
MDT THURSDAY MORNING. THEN GUSTY WINDS WILL BEGIN TO DEVELOP AND INCREASE
THROUGH THE DAY THURSDAY...PEAKING WITH GUSTS IN EXCESS OF 35 TO 40 MPH
POSSIBLE AFTER 4 PM MDT.

OUTLOOK FOR FRIDAY...A BAND OF SHOWERS IS EXPECTED TO MOVE INTO THE
BURN AREA AROUND SUNRISE FRIDAY MORNING ALONG A SURFACE TROUGH THAT
WILL SHIFT THE WINDS FROM A LIGHT SOUTH WIND TO A MORE GUSTY
WEST-SOUTHWEST WIND OF 12 TO 18 MPH WITH GUSTS TO AROUND 25 MPH AFTER
10 AM MDT FRIDAY. THE ACTUAL COLD FRONT WILL MOVE THROUGH THE BURN
AREA WITH A SHIFT TO NORTHWEST WINDS AND ADDITIONAL SHOWERS...LIKELY
SNOW...MOVING THROUGH THE AREA FRIDAY NIGHT.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
MIN TEMPERATURE.....25 TO 30 DEGREES.
MAX HUMIDITY........72-88 PERCENT.
WIND (20 FT)........WEST WINDS 10 TO 14 MPH WITH GUSTS TO AROUND 22
                    MPH...BECOMING SOUTHWEST AT 6 TO 10 MPH AFTER 7 PM
                    TONIGHT.
CWR.................0 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......DECREASING TO AROUND 600 FT AGL.
TRANSPORT WINDS.....WEST AROUND 25 MPH.
SMOKE DISPERSAL.....POOR TO FAIR (7300-18400 KNOT-FT).

.THURSDAY...

SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT).
MAX TEMPERATURE.....55 TO 60 DEGREES.
MIN HUMIDITY........23 TO 28 PERCENT.
WIND (20 FT)........SOUTHWEST AT 6 TO 10 MPH...INCREASING TO 12 TO
                    18 MPH WITH GUSTS TO AROUND 30 MPH AT 10 AM MDT.
                    THEN INCREASING AGAIN TO 20 TO 25 MPH
                    WITH GUSTS TO AROUND 35 TO 40 MPH FROM 4 PM MDT
                    THROUGH SUNSET.
CWR.................0 PERCENT.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......3400 FT AGL INCREASING TO 7700 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 26 MPH INCREASING TO 35 TO
                    40 MPH DURING THE LATE AFTERNOON.
SMOKE DISPERSAL.....GOOD TO EXCELLENT (50700-223400 KNOT-FT).

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