FNUS75 KBYZ 052332
FWSBYZ

SPOT FORECAST FOR GILEAD...USFS
NATIONAL WEATHER SERVICE BILLINGS MT
532 PM MDT WED SEP 5 2012

FORECAST IS BASED ON REQUEST TIME OF 1700 MDT ON SEPTEMBER 05.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
CLEAR SKIES AND TERRAIN DRIVEN WINDS WILL GIVE WAY TO INCREASING
NORTHWEST WINDS AND CLOUD COVER BEGINNING LATE TONIGHT AS A
COLD FRONT PUSHES THROUGH FROM THE NORTH. COLD FRONTAL PASSAGE IS
EXPECTED TO OCCUR BETWEEN 3 AM AND 6 AM THURSDAY MORNING. EXPECT
WIND GUSTS OUT OF THE NORTHWEST OR NORTH TO 30 MPH FOR SEVERAL
HOURS BEHIND THIS FRONT. THERE IS A GOOD CHANCE OF SHOWERS LATE
THURSDAY AFTERNOON AND EVENING...AND THOUGH SHOWERS SHOULD REMAIN
SCATTERED IN COVERAGE A WETTING RAIN IS POSSIBLE. AN ISOLATED
LIGHTNING STRIKE IS POSSIBLE BUT THE ACTIVITY SHOULD REMAIN MOSTLY
SHOWERY. ALONG WITH THE CHANCE OF PRECIPITATION WILL COME A
SIGNIFICANT RISE IN HUMIDITY AND MUCH COOLER TEMPS. SHOWER
ACTIVITY WILL TAPER OFF LATE THURSDAY NIGHT.

.TONIGHT...

SKY/WEATHER.........CLEAR THROUGH THE EVENING...THEN INCREASING
                    CLOUDS LATE.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....46-51.
MAX HUMIDITY........REMAINING UNDER 35 PERCENT FOR MOST OF THE
                    NIGHT...THEN HUMIDITY INCREASING TO
                    40-50 PERCENT LATE TONIGHT.
WIND (20 FT)........
 SLOPE/VALLEY.......BECOMING DOWNSLOPE/DOWNVALLEY 4-8 MPH AROUND
                    SUNSET. WINDS BECOMING PREDOMINANTLY
                    NORTHWEST 7-15 MPH AFTER 3 AM.
 RIDGETOP...........WEST TO NORTHWEST 10-20 MPH.
MIXING HEIGHT.......FALLING TO 500 FT AGL.
MIXING WINDS........WEST 10 MPH.
HAINES INDEX........4.

.THURSDAY...

SKY/WEATHER.........INCREASING CLOUDS. SCATTERED RAIN SHOWERS
                    AND ISOLATED THUNDERSTORMS IN THE AFTERNOON.
CWR.................15 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....60-65.
MIN HUMIDITY........32-37 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST TO NORTH 10-20 MPH WITH GUSTS TO
                    30 MPH. WINDS WILL TURN NORTH TO NORTHEAST
                    IN THE AFTERNOON.
 RIDGETOP...........WEST TO NORTHWEST 15-25 MPH. GUSTS TO 30
                    MPH IN THE MORNING.
MIXING HEIGHT.......4500 FT AGL.
MIXING WINDS........NORTHWEST 20 MPH.
HAINES INDEX........4.

.THURSDAY NIGHT...

SKY/WEATHER.........MOSTLY CLOUDY WITH SCATTERED RAIN
                    SHOWERS...TAPERING OFF OVERNIGHT.
CWR.................25 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....39-44.
MAX HUMIDITY........ABOVE 80 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST 5-15 MPH.
 RIDGETOP...........NORTHWEST 10-20 MPH.
MIXING HEIGHT.......FALLING TO 1500 FT AGL.
MIXING WINDS........NORTHWEST 10 MPH.
HAINES INDEX........3.

$$
FORECASTER...LESTER
REQUESTED BY...GALEN ROESLER
TYPE OF REQUEST...WILDFIRE
.TAG 20120905.GILEA.02/BYZ