FNUS75 KBYZ 311439
FWSBYZ

SPOT FORECAST FOR ANTELOPE BUTTE PILES...USFS BIGHORN NF
NATIONAL WEATHER SERVICE BILLINGS MT
839 AM MDT MON OCT 31 2011

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON OCTOBER 31.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...COLD FRONT EXPECTED TODAY...WITH HEAVY SNOW EXPECTED OVERNIGHT...

.DISCUSSION...

A COLD FRONT MOVING INTO THE BURN SITE WILL BRING STRONG GUSTY
NORTHWEST WINDS BY LATE THIS AFTERNOON. CHANCES FOR PRECIPITATION
WILL BE SLIM THROUGH THE MORNING... BUT WILL INCREASE THROUGH THE
AFTERNOON. THERE WILL BE A GOOD CHANCE FOR WETTING RAIN AT THE
BURN SITE AFTER 18Z. A RAIN/SNOW MIX IS EXPECTED THIS
EVENING...TURNING TO ALL SNOW OVERNIGHT...WITH AROUND 6 INCHES OF
NEW SNOW ACCUMULATING AT THE BURN SITE BY TUESDAY MORNING.
TEMPERATURES WILL RISE TO LOW 40S TODAY...WITH MAINLY INCREASING
RH VALUES AS THE WEATHER SYSTEM APPROACHES. HIGHS IN THE UPPER
20S CAN BE EXPECTED AT THE BURN SITE ON TUESDAY...WITH RELATIVE
HUMIDITIES AROUND 85 PERCENT. WEDNESDAY WILL BE COOL AND DRY.

.TODAY...

SKY/WEATHER.........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS AND SNOW
                    SHOWERS IN THE MORNING...THEN SCATTERED RAIN
                    SHOWERS IN THE AFTERNOON.
CWR.................24 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....39-44.
MIN HUMIDITY........35-40 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHEAST WINDS 5 TO 15 MPH.
 RIDGETOP...........WEST 15 TO 30 MPH.
MIXING HEIGHT.......3600 FT AGL.
MIXING WINDS........WEST 15 TO 25 MPH.

.TONIGHT...

SKY/WEATHER.........CLOUDY. SNOW LIKELY IN THE EVENING...THEN SNOW
                    OVERNIGHT.
CWR.................50 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....17-22.
MAX HUMIDITY........98-100 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST WINDS 15 TO 25 MPH.
 RIDGETOP...........NORTHWEST 15 TO 25 MPH.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........WEST 15 TO 25 MPH.

.TUESDAY...

SKY/WEATHER.........CLOUDY WITH SNOW.
CWR.................50 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....21-26.
MIN HUMIDITY........75-80 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTH WINDS 10 TO 20 MPH.
 RIDGETOP...........NORTHWEST 10 TO 20 MPH.
MIXING HEIGHT.......3100 FT AGL.
MIXING WINDS........NORTH 10 TO 20 MPH.

$$
FORECASTER...GILSTAD/HOOLEY
REQUESTED BY...MARVIN MATTHIESEN
TYPE OF REQUEST...PRESCRIBED
.TAG 20111031.ANTEL.01/BYZ