FNUS75 KBYZ 311402
FWSBYZ

SPOT FORECAST FOR BLACK SPRINGS RX...NCA
NATIONAL WEATHER SERVICE BILLINGS MT
802 AM MDT SUN OCT 31 2010

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON OCTOBER 31.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
LIGHT NORTHERLY DRAINAGE WINDS CAN BE EXPECTED EARLY THIS MORNING
...TURNING TO THE WEST AND NORTHWEST BY LATE MORNING INTO THE
AFTERNOON. MIXING HEIGHTS WILL BE AROUND 2750 FT LATE
MORNING...CLIMBING TO AROUND 4200 FT BY MID AFTERNOON. TEMPS WILL
WARM INTO THE MID 50S RESULTING IN MINIMUM RH READINGS IN THE 30
TO 40 PERCENT RANGE. LOOK FOR A WEAK DISTURBANCE TO CROSS OVER
THE REGION THIS EVENING...BUT ANY SHOWERS WILL BE LIGHT AND
MAINLY TO THE SOUTH OF THE BURN SITE. WINDS MAY PICK UP AT RIDGE
TOP LEVEL OVERNIGHT AS THE DISTURBANCE MOVES THROUGH. WINDS WILL
START OUT NORTHWESTERLY EARLY MONDAY...BUT TURN SOUTHERLY THROUGH
THE DAY. MIXING HEIGHTS ARE EXPECTED TO BE HIGHER MONDAY
AFTERNOON. BT


.TODAY...

SKY/WEATHER.........PARTLY SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....52-57.
MIN HUMIDITY........33-40 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......LIGHT NORTH WINDS EARLY...TURNING WEST TO NORTHWEST
                    7 TO 14 MPH BY LATE MORNING AND AFTERNOON.
RIDGETOP............NORTHWEST 15 TO 25 MPH.
MIXING HEIGHT.......3400 FT AGL.
MIXING WINDS........WEST 10 TO 20 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. A FEW SHOWERS...MAINLY TO THE SOUTH LATE.
CWR.................4 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....39-44.
MAX HUMIDITY........64-74 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 5 TO 15 MPH.
 RIDGETOP...........NORTHWEST 15 TO 25 MPH.
MIXING HEIGHT.......600 FT AGL.
MIXING WINDS........WEST 15 TO 25 MPH.

.MONDAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....55-60.
MIN HUMIDITY........30-35 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 10 MPH.
 RIDGETOP...........NORTHWEST 10 TO 20 MPH EARLY...BECOMING SOUTHERLY IN THE AFTERNOON.
MIXING HEIGHT.......4500 FT AGL.
MIXING WINDS........NORTHWEST 5 TO 15 MPH EARLY...THEN SOUTHWEST 10 TO 15 MPH.

$$
FORECASTER...TESAR
REQUESTED BY...MIKE BEARCOMESOUT
TYPE OF REQUEST...PRESCRIBED
.TAG 20101031.BLACK.01/BYZ