FNUS75 KBYZ 092023
FWSBYZ

SPOT FORECAST FOR GILEAD...USFS
NATIONAL WEATHER SERVICE BILLINGS MT
223 PM MDT SUN SEP 9 2012

FORECAST IS BASED ON REQUEST TIME OF 1402 MDT ON SEPTEMBER 09.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT FROM NOON MONDAY TO MIDNIGHT MDT
TUESDAY NIGHT...

.DISCUSSION...
WINDS WILL BE A LITTLE TRICKY THIS AFTERNOON. AS THE SLOPE HEATS
UP...THE WINDS WILL TRY TO DRIVE UP THE SLOPE. INCREASING WINDS
ALOFT WILL TRY TO MIX DOWN THE SLOPES THIS AFTERNOON AS WELL. THIS
WILL MAKE THE WINDS A LITTLE ERRATIC THIS AFTERNOON. THE UPSLOPE
AND UPCANYON FORCES SHOULD WIN OUT MOST OF THE TIME THOUGH.
HUMIDITIES WILL BE VERY LOW. THE WINDS WILL TURN DOWNSLOPE AND
DOWNCANYON THIS EVENING.

CRITICAL FIRE WEATHER CONDITIONS ARE STILL EXPECTED FROM MONDAY
THROUGH TUESDAY DUE TO LOW HUMIDITY AND GUSTY WINDS. IT WILL BE
UNSTABLE ON MONDAY AS WELL. WINDS WILL BE PRIMARILY FROM THE
SOUTHWEST AS INCREASING MID LEVEL WINDS MIX DOWN THE SLOPE. THE
WINDS WILL MAKE A SWITCH TO THE NORTHWEST ON MONDAY EVENING AS A
COLD FRONT MOVES THROUGH. THE FRONT WILL MOVE IN DURING THE MID
TO LATE EVENING. TUESDAY WILL BE COOLER BUT HUMIDITIES WILL REMAIN
LOW WITH GUSTY WINDS. TWH

.REST OF TODAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MAX TEMPERATURE.....82-87.
MIN HUMIDITY........10-15 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......PRIMARILY OUT OF THE EAST TO NORTHEAST AT
                    4 TO 12 MPH. WINDS WILL BE A LITTLE ERRATIC
                    THIS AFTERNOON.
 RIDGETOP...........WEST 10 TO 20 MPH.
MIXING HEIGHT.......9500 FT AGL.
MIXING WINDS........SOUTHWEST 10 TO 15 MPH.
HAINES INDEX........4.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
LAL.................1...NO THUNDERSTORMS.
MIN TEMPERATURE.....48-53.
MAX HUMIDITY........32-37 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST TO NORTHWEST WINDS 8 TO 16 MPH.
 RIDGETOP...........WEST TO NORTHWEST 10 TO 20 MPH.
MIXING HEIGHT.......1100 FT AGL.
MIXING WINDS........SOUTHWEST 10 TO 20 MPH.
HAINES INDEX........4.

.MONDAY...

SKY/WEATHER.........PARTLY SUNNY WITH ISOLATED SHOWERS AND
                    THUNDERSTORMS. GUSTY AND ERRATIC WINDS
                    EXPECTED NEAR THUNDERSTORMS.
CWR.................8 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....78-83.
MIN HUMIDITY........12-17 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 12 TO 20 MPH. GUSTS TO
                    26 MPH IN THE AFTERNOON.
 RIDGETOP...........WEST 15 TO 30 MPH.
MIXING HEIGHT.......9200 FT AGL.
MIXING WINDS........SOUTHWEST 15 TO 25 MPH.
HAINES INDEX........6.

$$
FORECASTER...HUMPHREY
REQUESTED BY...TIM KRAMER
TYPE OF REQUEST...WILDFIRE
.TAG 20120909.GILEA.02/BYZ