FNUS75 KCYS 291110
FWSCYS

SPOT FORECAST FOR NF SLASH PILE...CENTENNIAL VALLEY VFD
NATIONAL WEATHER SERVICE CHEYENNE WY
510 AM MDT SAT MAY 29 2010

FORECAST IS BASED ON IGNITION TIME OF 0700 MDT ON MAY 29.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
COLD FRONT ALREADY PASSED THE BURN SITE THIS MORNING. ISOLATED
SHOWERS AND THUNDERSTORMS WILL BECOME POSSIBLE THIS AFTERNOON AS
MID LEVEL MOISTURE AND CLOUDS EXPECTED TO INCREASE AS AN UPPER LEVEL
TROUGH APPROACHES THE BURN SITE. MINIMUM RELATIVE HUMIDITIES WILL
FALL TO AROUND 30 PERCENT THIS AFTERNOON WITH GOOD RECOVERIES
EXPECTED TONIGHT.

.TODAY...

SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (70-80 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.....52 TO 56.
MIN HUMIDITY........29 TO 34 PERCENT.
WIND (20 FT)........NORTHEAST 5-9 MPH BECOMING WEST AROUND NOON
                    AT 8 TO 12 MPH WITH GUSTS TO AROUND 18.
CWR.................0 PERCENT INCREASING TO 10 PERCENT IN THE
                    AFTERNOON.
LAL.................2.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......300 TO 500 FT AGL...INCREASING TO 1900 TO 2100 FT
                    BY 1100...AND INCREASING AGAIN TO 4500 TO 5500 FT
                    AGL BY 1300.
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH.
SMOKE DISPERSAL.....BECOMING EXCELLENT (67100-169800 KNOT-FT) BY 1300.

$$
FORECASTER...CARPENTER
REQUESTED BY...ERIC GREGORY
TYPE OF REQUEST...PRESCRIBED
.TAG 20100529.NFSLA.01/CYS