FNUS75 KBYZ 291922
FWSBYZ

SPOT FORECAST FOR CATHEDRAL PEAK...BILLINGS DISAPTCH
NATIONAL WEATHER SERVICE BILLINGS MT
122 PM MDT THU SEP 29 2011

FORECAST IS BASED ON REQUEST TIME OF 1246 MDT ON SEPTEMBER 29.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

...CRITICAL FIRE WEATHER CONDITIONS POSSIBLE SATURDAY...

UPSLOPE AND UPVALLEY WINDS OF 5 TO 10 MPH ARE EXPECTED AT THE FIRE
SITE THIS AFTERNOON. A FEW GUSTS TO 15 MPH ARE POSSIBLE. THE WINDS
AT RIDGETOP LEVEL AND IN HIGH-ELEVATION EXPOSED AREAS WILL BE FROM
THE WEST UP TO 20 MPH. MINIMUM RELATIVE HUMIDITY WILL BE AROUND 20
PERCENT. IT WILL BE WARMER ON FRIDAY WITH LOWER RELATIVE HUMIDITY.
WINDS ON FRIDAY MAY REMAIN FROM THE WEST OR SOUTHWEST. HUMIDITY ON
SATURDAY MAY FALL TO 15 PERCENT OR LOWER WITH THE POSSIBILITY FOR
STRONGER WINDS. CRITICAL FIRE WEATHER CONDITIONS ARE THUS POSSIBLE
SATURDAY.


.TODAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....63-68.
MIN HUMIDITY........18-23 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......UPSLOPE/UPVALLEY 5 TO 10 MPH.
                    GUSTS TO 15 MPH.
 RIDGETOP...........WEST 10 TO 20 MPH.
MIXING HEIGHT.......9000 FT AGL.
MIXING WINDS........WEST 10 TO 20 MPH.

.TONIGHT...

SKY/WEATHER.........CLEAR.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....42-47.
MAX HUMIDITY........55-60 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......DOWNSLOPE/DOWNVALLEY 4 TO 7 MPH. THE
                    WINDS MAY BE STRONGER BY MORNING.
 RIDGETOP...........WEST 10 TO 20 MPH.
MIXING HEIGHT.......800 FT AGL.
MIXING WINDS........WEST 15 TO 25 MPH.

.FRIDAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....69-74.
MIN HUMIDITY........15-20 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST-SOUTHWEST 5 TO 10 MPH.
                    GUSTS TO 15 MPH.
 RIDGETOP...........WEST-SOUTHWEST 15 TO 25 MPH.
MIXING HEIGHT.......5200 FT AGL.
MIXING WINDS........WEST-SOUTHWEST 15 TO 25 MPH.

$$
FORECASTER...SCHULTZ/CHAMBERS
REQUESTED BY...LAURA
TYPE OF REQUEST...WILDFIRE
.TAG 20110929.CATHE.01/BYZ