FNUS75 KBYZ 241125
FWSBYZ

SPOT FORECAST FOR SOUTH CANYON...BIGHORN NATIONAL FOREST
NATIONAL WEATHER SERVICE BILLINGS MT
525 AM MDT SAT SEP 24 2011

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON SEPTEMBER 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
...WELL ABOVE NORMAL TEMPERATURES WITH LOW HUMIDITIES
THROUGH SUNDAY...
...COLD FRONT PASSAGE MONDAY...

A STRONG RIDGE OF HIGH PRESSURE WILL BRING TEMPERATURES IN THE
MID 60S TO LOWER 70S AND MINIMUM RELATIVE HUMIDITIES IN THE
UPPER TEENS TO MID 20S TO THE BURN SITE BOTH TODAY AND SUNDAY.
HUMIDITIES WILL RECOVER INTO THE 50 TO 55 PERCENT RANGE TONIGHT.
WINDS WILL BE NORTH 5 TO 10 MPH TODAY. WINDS WILL BE SOUTHEAST
5 TO 10 MPH THIS EVENING AND SHIFT TO THE WEST OVERNIGHT. ON
SUNDAY...WEST WINDS 5 TO 10 MPH IN THE MORNING WILL SHIFT TO
THE SOUTHWEST IN THE AFTERNOON. NO PRECIPITATION WILL OCCUR
THROUGH SUNDAY. FOR PLANNING PURPOSES...A COLD FRONT WILL MOVE
EAST ACROSS THE BURN SITE AROUND MIDDAY ON MONDAY.

.TODAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....66-71.
MIN HUMIDITY........19-24 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTH WINDS 5 TO 10 MPH.
 RIDGETOP...........NORTHEAST 5 TO 10 MPH.
MIXING HEIGHT.......6200 FT AGL.
MIXING WINDS........NORTH 5 TO 15 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....50-55.
MAX HUMIDITY........50-55 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHEAST WINDS 5 TO 10 MPH IN THE EVENING
                    SHIFTING TO THE WEST OVERNIGHT.
 RIDGETOP...........SOUTH 5 TO 15 MPH.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........WEST 5 TO 10 MPH.

.SUNDAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....66-71.
MIN HUMIDITY........18-23 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 5 TO 10 MPH IN THE MORNING SHIFTING
                    TO THE SOUTHWEST IN THE AFTERNOON.
 RIDGETOP...........SOUTHWEST 5 TO 15 MPH.
MIXING HEIGHT.......5900 FT AGL.
MIXING WINDS........SOUTHWEST 5 TO 15 MPH.

$$
FORECASTER...ARTHUR
REQUESTED BY...CURTIS RASMUSON
TYPE OF REQUEST...PRESCRIBED
.TAG 20110924.SOUTH.01/BYZ