FNUS75 KBYZ 162258
FWSBYZ

SPOT FORECAST FOR DRY FORK RX...USFS GALLATIN
NATIONAL WEATHER SERVICE BILLINGS MT
458 PM MDT WED SEP 16 2009

FORECAST IS BASED ON IGNITION TIME OF 1710 MDT ON SEPTEMBER 16.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...CONTINUED HOT WITH ISOLATED AFTERNOON SHOWERS AND THUNDERSTORMS
THURSDAY...

.DISCUSSION...

CUMULUS CLOUDS WILL CONTINUE TO MOVE OVER THE BURN SITE THIS
AFTERNOON AND EVENING WITH A BRIEF SHOWER POSSIBLE. EVEN IF A
SHOWER DOES NOT APPROAHC THE BURN...WINDS WILL BE VARIABLE FOR THE NEXT
HOURS DUE TO OUTFLOWS FROM THE SHOWERS. OVERNIGHT IT WILL CLEAR
AND BE UNSEAONABLY WARM WITH WINDS BECOMING LIGHT AND MAINLY
DOWNSLOPE. THURSDAY EXPECT WINDS TO BE A BIT LIGHTER AS PRESSURE
GRADIENTS OVER THE SITE WEAKEN WITH WINDS MAINLY SLOPE DRIVEN.
TEMPERATURES WILL BE 3 TO 4 DEGREES WARMER WITH HUMIDITY SIMILAR
TO TODAY. THE AIRMASS WILL BECOME UNSTABLE IN THE AFTERNOON AND
ISOLATED SHOWERS AND THUNDERSTORMS WILL DEVELOP WITH STORMS HAVING
HIGH BASES AND PRODUCING GUSTY WINDS. FRIDAY WILL BE A BIT COOLER
BUT STILL ON THE WARM SIDE FOR MID SEPTEMBER WITH STILL A CHANCE
FOR ISOLATED THUNDERSTORMS.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS IN THE EVENING.
MIN TEMPERATURE.....53-58.
MAX HUMIDITY........61-66 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHEAST WINDS 5 TO 10 MPH. GUSTY WINDS NEAR
                    ANY SHOWERS.
 RIDGETOP...........SOUTHWEST 5 TO 15 MPH.
MIXING HEIGHT.......1300 FT AGL.
MIXING WINDS........SOUTHEAST 5 TO 15 MPH.

.THURSDAY...

SKY/WEATHER.........SUNNY...ISOLATED LATE DAY SHOWERS AND
                    THUNDERSTORMS.
MAX TEMPERATURE.....78-82.
MIN HUMIDITY........28-32 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTH WINDS 5 TO 10 MPH...MAINLY SLOPE
                    DRIVEN. GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR THUNDERSTORMS LATE AFTERNOON.
 RIDGETOP...........SOUTHWEST 10 TO 15 MPH.
MIXING HEIGHT.......9300 FT AGL.
MIXING WINDS........SOUTHWEST 5 TO 15 MPH.

.THURSDAY NIGHT...

SKY/WEATHER.........PARTLY CLOUDY. ISOLATED SHOWERS AND
                    THUNDERSTORMS IN THE EVENING.
MIN TEMPERATURE.....47-52.
MAX HUMIDITY........63-68 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHEAST WINDS 5 TO 10 MPH IN THE EVENING
                    SHIFTING TO THE NORTHEAST OVERNIGHT. GUSTY AND
                    ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS IN
                    THE EVENING.
 RIDGETOP...........SOUTH 5 TO 10 MPH.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........SOUTHEAST 5 TO 10 MPH.

.FRIDAY...

SKY/WEATHER.........PARTLY CLOUDY.
MAX TEMPERATURE.....70-75.
MIN HUMIDITY........31-36 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHEAST WINDS 5 TO 10 MPH.
 RIDGETOP...........SOUTH 5 TO 15 MPH.
MIXING HEIGHT.......9500 FT AGL.
MIXING WINDS........SOUTHEAST 5 TO 10 MPH.

$$
FORECASTER...BORSUM
REQUESTED BY...ASHLEY SITES
TYPE OF REQUEST...PRESCRIBED
.TAG 20090916.DRYFO.03/BYZ