FNUS75 KBYZ 251426
FWSBYZ

SPOT FORECAST FOR SOUTH CANYON...BIGHORN NATIONAL FOREST
NATIONAL WEATHER SERVICE BILLINGS MT
826 AM MDT SUN SEP 25 2011

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON SEPTEMBER 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...WARM AND DRY TODAY...

...COLD FRONTAL PASSGE LATE TONIGHT TOWARD MONDAY MORNING...

.DISCUSSION...
WINDS WILL BE UPSLOPE THROUGH THE DAY AND BE VERY SIMILAR TO
SATURDAY. TODAY WILL BE WARM AND DRY WITH HUMIDITIES FALLING INTO
THE TEENS THIS AFTERNOON. WINDS WILL TURN DOWNSLOPE THIS EVENING.
A COLD FRONT WILL PUSH INTO THE SITE LATE TONIGHT AND TOWARD
MONDAY MORNING. THIS FRONT WILL PROVIDE COOLER TEMPERATURES AND
HIGHER HUMIDITIES FOR MONDAY...ALONG WITH KEEPING WINDS TO THE
WEST DURING THE DAY. THE FRONT WILL COME THROUGH DRY. TWH


.TODAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....71-76.
MIN HUMIDITY........14-19 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 4 TO 12 MPH.
 RIDGETOP...........NORTHWEST 5 TO 10 MPH.
MIXING HEIGHT.......8200 FT AGL.
MIXING WINDS........WEST 10 TO 15 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....45-50.
MAX HUMIDITY........45-50 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 4 TO 12 MPH IN THE EARLY EVENING
                    WINDS TURNING NORTHWEST BY LATE EVENING.
 RIDGETOP...........WEST 5 TO 15 MPH.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........WEST 10 TO 15 MPH.

.MONDAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....61-66.
MIN HUMIDITY........21-26 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 6 TO 14 MPH.
 RIDGETOP...........WEST 5 TO 10 MPH.
MIXING HEIGHT.......5900 FT AGL.
MIXING WINDS........WEST 10 TO 15 MPH.

$$
FORECASTER...HUMPHREY
REQUESTED BY...CURTIS RASMUSON
TYPE OF REQUEST...PRESCRIBED
.TAG 20110925.SOUTH.01/BYZ