FNUS75 KTFX 062143
FWSTFX

SPOT FORECAST FOR SOUTH DEEP...USFS
NATIONAL WEATHER SERVICE GREAT FALLS MT
343 PM MDT SUN SEP 6 2009

FORECAST IS BASED ON REQUEST TIME OF 1500 MDT ON SEPTEMBER 06.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...A COLD FRONT WILL MOVE THROUGH THE FIRE AREA AROUND 1800 THIS
EVENING WITH A WIND SHIFT TO THE WEST AND NORTHWEST...


.DISCUSSION...
A COLD FRONT...CURRENTLY ORIENTED ALONG THE I-15 CORRIDOR..WILL
MOVE EAST THROUGH THE REMAINDER OF THIS AFTERNOON...LIKELY REACHING THE
FIRE AREA AROUND 1800 THIS EVENING. WINDS ON STEEPER/SHELTERED
EAST/NORTHEAST SLOPES WILL LIKELY REMAIN SLOPE-DRIVEN UNTIL THE
FRONT ARRIVES...SWITCHING WINDS TO WEST-NORTHWESTERLY. EXPOSED
LOCATIONS AND RIDGETOPS WILL SEE BREEZY SOUTHWEST WINDS SHIFTING
TO WEST-NORTHWESTERLY AND INCREASING SOME WITH THE FRONTAL PASSAGE
THIS EVENING. SHOWERS AND THUNDERSTORMS ARE CURRENTLY VERY
ISOLATED UPSTREAM OF THE FIRE AREA BUT SHOULD INCREASE IN COVERAGE
SOME THIS EVENING WITH THE THREAT FOR LIGHT SHOWERS CONTINUING
THROUGH TONIGHT. MUCH COOLER CONDITIONS WILL ARRIVE TONIGHT BEHIND
THE FRONT WITH GOOD HUMIDITY RECOVERIES ANTICIPATED TONIGHT.
COOLER CONDITIONS WILL CONTINUE ON LABOR DAY WITH CLOUDY
CONDITIONS IN THE MORNING GIVING WAY TO PARTIAL CLEARING IN THE
AFTERNOON. HOENISCH

.REST OF TODAY...

SKY/WEATHER.........PARTLY SUNNY. A CHANCE OF SHOWERS AND
                    THUNDERSTORMS.
CWR.................20 PERCENT.
MAX TEMPERATURE.....74-79.
MIN HUMIDITY........23-28 PERCENT.
WIND (20 FT)........UP-SLOPE 3 TO 6 MPH....BECOMING WEST-NORTHWEST
                    6-12 MPH WITH GUSTS TO 18 MPH AROUND 1800.
RIDGE TOP WIND......SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS TO
                    25 MPH...SHIFTING TO NORTHWEST AT 15 TO 20 MPH
                    WITH GUSTS TO 30 MPH AROUND 1800.
MIXING HEIGHT.......4000 FT AGL.
MIXING WINDS........SOUTHWEST AROUND 20 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. SCATTERED SHOWERS AND
                    THUNDERSTORMS IN THE EVENING...THEN ISOLATED
                    RAIN SHOWERS AFTER MIDNIGHT.
CWR.................20 PERCENT.
MIN TEMPERATURE.....40-45.
MAX HUMIDITY........80-90 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 6 TO 12 MPH WITH GUSTS TO 18 MPH
                    IN THE EVENING....DECREASING TO 4 TO 8 MPH AFTER
                    SUNSET.
RIDGE TOP WIND......NORTHWEST 15 TO 20 MPH WITH GUSTS TO 30 MPH IN
                    THE EVENING...DECREASING TO 10 TO 15 MPH AROUND
                    MIDNIGHT.
MIXING HEIGHT.......500 FT AGL.
MIXING WINDS........NORTHWEST AROUND 15 MPH.

.LABOR DAY...

SKY/WEATHER.........MOSTLY CLOUDY IN THE MORNING...BECOMING
                    PARTLY CLOUDY IN THE AFTERNOON. A SLIGHT CHANCE
                    SHOWERS.
CWR.................10 PERCENT.
MAX TEMPERATURE.....62-67.
MIN HUMIDITY........33-38 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 10 MPH.
RIDGE TOP WIND......NORTHWEST WINDS 10 TO 15 MPH.
MIXING HEIGHT.......5000 FT AGL.
MIXING WINDS........NORTHWEST AROUND 10 MPH.

$$
FORECASTER...HOENISCH
REQUESTED BY...SHEILA WEATHERWAX
TYPE OF REQUEST...WILDFIRE
.TAG 20090906.SOUTH.02/TFX