FNUS75 KBYZ 192113
FWSBYZ

SPOT FORECAST FOR DRY FORK RX...USFS
NATIONAL WEATHER SERVICE BILLINGS MT
313 PM MDT SAT SEP 19 2009

FORECAST IS BASED ON IGNITION TIME OF 1510 MDT ON SEPTEMBER 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

THE FIRE WEATHER WATCH HAS BEEN CANCELLED FOR THE FIRE AREA. A
STRONG COLD FRONT WILL MOVE THROUGH THE FIRE AREA AROUND 10 PM
MDT. IF THUNDERSTORMS DEVELOP TO THE WEST OF THE FIRE AREA THE
FRONT MAY ARRIVE EARLIER. NORTHWEST WINDS WILL BE STRONG ALONG
AND BEHIND THE FRONT WITH GUSTS TO 40 MPH AT TIMES THROUGH LATE
TONIGHT. RH VALUES ARE EXPECTED TO RISE INTO THE LOWER 20S BY THE
TIME THE FRONT ARRIVES...WITH A MORE SUBSTANTIAL RISE BEHIND THE
FRONT. SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED FROM LATE
TONIGHT THROUGH SUNDAY MORNING...WITH MORE NUMEROUS SHOWERS SUNDAY
AFTERNOON. TOMORROW WILL BE WINDY BUT COOLER WITH MIN RH VALUES
IN THE UPPER 30S AND LOWER 40S.

THE LOWER ELEVATIONS OF THE BURN AREA WILL SEE LOWER WIND SPEEDS
DUE TO SHELTERING FROM NORTHWEST WINDS. THE WINDS FORECAST ARE
HEDGED TOWARD THE MID TO UPPER PORTION OF THE BURN AREA.

.REST OF TODAY...

SKY/WEATHER.........MOSTLY SUNNY. ISOLATED SHOWERS AND THUNDERSTORMS.
CWR.................10 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....78-82.
MIN HUMIDITY........15-19 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 10 TO 20 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.
 RIDGETOP...........WEST 15 TO 30 MPH.
MIXING HEIGHT.......7400 FT AGL.
MIXING WINDS........WEST 15 TO 25 MPH.

.TONIGHT...

SKY/WEATHER.........BECOMING MOSTLY CLOUDY. SCATTERED SHOWERS AND
                    THUNDERSTORMS.
CWR.................20 PERCENT.
LAL.................3...9 TO 15 STRIKES/15 MIN/CELL.
MIN TEMPERATURE.....42-46.
MAX HUMIDITY........85-90 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 10 TO 20 MPH...BECOMING NORTHWEST 15 TO 25 MPH WITH
                    GUSTS TO 40 MPH AFTER 10 PM MDT. NORTHWEST WINDS DIMINISH TO
                    5 TO 15 MPH AROUND 3 AM MDT. GUSTY AND ERRATIC WINDS EXPECTED
                    NEAR THUNDERSTORMS.
 RIDGETOP...........SOUTHWEST 20 TO 35 MPH...BECOMING NORTHWEST 30 TO 40 MPH AFTER 10
                    PM MDT. .
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........WEST 20 TO 35 MPH.

.SUNDAY...

SKY/WEATHER.........MOSTLY CLOUDY. SCATTERED RAIN SHOWERS IN THE
                    MORNING. ISOLATED THUNDERSTORMS THROUGH THE
                    DAY. NUMEROUS RAIN SHOWERS IN THE AFTERNOON.
CWR.................30 PERCENT.
LAL.................2...1 TO 8 STRIKES/15 MIN/CELL.
MAX TEMPERATURE.....46-51.
MIN HUMIDITY........38-44 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST WINDS 5 TO 10 MPH IN THE MORNING...INCREASING
                    TO 20 TO 30 MPH WITH GUSTS TO 40 MPH IN THE AFTERNOON.
                    GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS.
 RIDGETOP...........NORTHWEST 20 TO 30 MPH.
MIXING HEIGHT.......3100 FT AGL.
MIXING WINDS........WEST 20 TO 35 MPH.

$$
FORECASTER...CHAMBERS
REQUESTED BY...GREG JUVAN
TYPE OF REQUEST...PRESCRIBED
.TAG 20090919.DRYFO.01/BYZ