FNUS75 KBYZ 301430
FWSBYZ

SPOT FORECAST FOR BULL...FOREST SERVICE
NATIONAL WEATHER SERVICE BILLINGS MT
830 AM MDT SAT JUL 30 2011

FORECAST IS BASED ON REQUEST TIME OF 0807 MDT ON JULY 30.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

A PUSH OF MID LEVEL MOISTURE WILL REACH THE FIRE LATER THIS
AFTERNOON AND SUPPORT THE DEVELOPMENT OF THUNDERSTORMS LATE THIS
AFTERNOON. TEMPERATURES WILL REACH 80 DEGREES WITH HUMIDITY
MINIMUMS IN THE UPPER TEENS. EXPECT CUMULUS TO BEGIN DEVELOPING
AROUND 1500 AND AN ISOLATED THUNDERSTORM IS POSSIBLE BY 1700. ANY
STORM THAT APPROACHES THE FIRE WILL BE SLOW MOVING AND HAVE A
CHANCE TO PRODUCE HEAVY RAIN AND GUSTY WINDS. ANY THUNDERSTORMS
THAT GET NORTH OF THE FIRE COULD PRODUCE DOWN CANYON WINDS.
OTHERWISE EXPECT WINDS TO SWITCH TO A SOUTHERLY UP CANYON FLOW
EARLY THIS AFTERNOON. ANY INVERSION THAT FORMS TONIGHT WILL BE
PRETTY WEAK. THE MOISTURE DEEPENS FOR SUNDAY WITH CONTINUED WARM
TEMPERATURES AND EVEN MORE THUNDERSTORM COVERAGE. BORSUM


.TODAY...

SKY/WEATHER.........MOSTLY SUNNY...AFTERNOON CUMULUS WITH AN
                    ISOLATED THUNDERSTORM AFTER 1700.
CWR.................10 PERCENT.
LAL.................2...1-8 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....77-81.
MIN HUMIDITY........16-20 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTH WINDS 9 TO 15 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.
 RIDGETOP...........SOUTHWEST 10 TO 20 MPH.
MIXING HEIGHT.......5000 FT AGL.
MIXING WINDS........SOUTHWEST 10 TO 20
MPH.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY WITH ISOLATED SHOWERS AND
                    THUNDERSTORMS.
CWR.................10 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MIN TEMPERATURE.....46-51.
MAX HUMIDITY........75-80 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......BECOMING NORTH 6 TO 9 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.
 RIDGETOP...........SOUTHWEST 15 TO 25 MPH.
MIXING HEIGHT.......1000 FT AGL.
MIXING WINDS........SOUTHWEST 15 TO 25 MPH.

.SUNDAY...

SKY/WEATHER.........MOSTLY SUNNY. ISOLATED SHOWERS AND
                    THUNDERSTORMS IN THE MORNING...THEN SCATTERED
                    SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
CWR.................22 PERCENT.
LAL.................3...9 TO 15 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....76-81.
MIN HUMIDITY........22-27 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 10 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.
 RIDGETOP...........WEST 15 TO 25 MPH.
MIXING HEIGHT.......11800 FT AGL.
MIXING WINDS........WEST 15 TO 25 MPH.

$$
FORECASTER...BORSUM
REQUESTED BY...DENNIS SHERIDAN
TYPE OF REQUEST...WILDFIRE
.TAG 20110730.BULL_.01/BYZ