FNUS75 KBYZ 131447
FWSBYZ

SPOT FORECAST FOR BEAVER CREEK SOUTH...USFS BIGHORN NF
NATIONAL WEATHER SERVICE BILLINGS MT
847 AM MDT MON MAY 13 2013

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON MAY 13.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

DRY AND BECOMING WINDY THIS AFTERNOON WITH GUSTS TO 30 MPH
EXPECTED. RH VALUES WILL DROP INTO THE LOWER 20S AS WINDS TURN
SOUTHWESTERLY THIS AFTERNOON. COLD FRONT WILL MOVE INTO THE REGION
TONIGHT WITH ISOLATED THUNDERSTORMS POSSIBLE. ANY STORMS THAT FORM
WILL HAVE THE POTENTIAL FOR WIND GUSTS OF 40 TO 50 MPH. TUESDAY
WILL BE COOLER WITH HIGHER RELATIVE HUMIDITIES. WINDS WILL BE WEST
TO NORTHWEST WITH SOME GUSTS 25 TO 30 MPH POSSIBLE. CHAMBERS

.TODAY...

SKY/WEATHER.........PARTLY CLOUDY WITH AFTERNOON CUMULUS DEVELOPING.
CWR.................ZERO.
LAL.................1...NONE.
MAX TEMPERATURE.....57-63.
MIN HUMIDITY........22-27 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......DOWNSLOPE/VALLEY 4 TO 8 MPH...BECOMING SOUTHWEST 10 TO 20 MPH
                    BY NOON WITH GUSTS TO 30 MPH.
 RIDGETOP...........WEST 15 TO 25 MPH.
MIXING HEIGHT.......7400 FT AGL.
MIXING WINDS........SOUTHWEST 15 TO 30 MPH.
HAINES INDEX........5.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. ISOLATED THUNDERSTORMS IN THE
                    EVENING. SOME THUNDERSTORMS MAY PRODUCE GUSTY
                    WINDS IN THE EVENING.
CWR.................10 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MIN TEMPERATURE.....43-48.
MAX HUMIDITY........55-60 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 15 TO 25 MPH SHIFTING TO THE
                    NORTHWEST 8 TO 15 MPH AROUND 3 AM. GUSTY AND
                    ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN
                    THE EVENING.
 RIDGETOP...........WEST 20 TO 35 MPH.
MIXING HEIGHT.......5300 FT AGL.
MIXING WINDS........WEST 20 TO 35 MPH.
HAINES INDEX........4.

.TUESDAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....45-49.
MIN HUMIDITY........28-32 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST WINDS 10 TO 20 MPH. GUSTS UP TO 30
                    MPH IN THE AFTERNOON.
 RIDGETOP...........WEST 15 TO 30 MPH.
MIXING HEIGHT.......5500 FT AGL.
MIXING WINDS........WEST 15 TO 25 MPH.
HAINES INDEX........5.

$$
FORECASTER...CHAMBERS
REQUESTED BY...MARVIN MATTHIESEN
TYPE OF REQUEST...PRESCRIBED
.TAG 20130513.BEAVE.01/BYZ