FNUS75 KMSO 101536
FWSMSO

SPOT FORECAST FOR PETTY ROCK 12
NATIONAL WEATHER SERVICE MISSOULA MT
936 AM MDT THU SEP 10 2009

FORECAST IS BASED ON IGNITION TIME OF 1200 MDT ON SEPTEMBER 10.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A NORTHWEST FLOW ALOFT WILL DEVELOP TODAY AS A WEAK
WEATHER DISTURBANCE SHIFTS INTO EASTERN MONTANA.  AS THE ATMOSPHERE
BECOMES MARGINALLY UNSTABLE IN THE LOW LEVELS THIS AFTERNOON...
SOME OF THESE WINDS WILL MIX TO THE SURFACE.  FOR THIS SPOT LOCATION...
THIS SHOULD TRANSLATE INTO WHAT IS TYPICALLY SEEN WITH UP VALLEY
FLOW IN THE AFTERNOON...POSSIBLY SLIGHTLY STRONGER.  HIGH
PRESSURE AND A STABLE ATMOSPHERE WILL DEVELOP TONIGHT AND FRIDAY.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY.  A FEW HIGH CLOUDS.
MAX TEMPERATURE.....79.
MIN HUMIDITY........20 PERCENT.
WIND (20 FT)........VARIABLE 1 TO 5 MPH BECOMING NORTHWEST 7-10 MPH
                    WITH GUSTS TO 25 MPH IN THE AFTERNOON AFTER
                    2 P.M.
MIXING HEIGHT.......INCREASING TO 6000 FT AGL.
MIXING WINDS........NORTHWEST 15 MPH.

.TONIGHT...

MIN TEMPERATURE.....40-42.
MAX HUMIDITY........87-92 PERCENT.
WIND (20 FT)........NORTHWEST 7-10 MPH WITH GUSTS 25 MPH DURING THE
                    EARLY EVENING...DECREASING TO VARIABLE 5 MPH
                    BEFORE MIDNIGHT...AND THEN SOUTHEAST 3-7 MPH
                    TOWARD MORNING.

.FRIDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....83-85.
MIN HUMIDITY........14-17 PERCENT.
WIND (20 FT)........SOUTHEAST 3-9 MPH.
MIXING HEIGHT.......INCREASING TO 3000 FT AGL.
MIXING WINDS........EAST 10 MPH.

$$
FORECASTER...BAUCK
REQUESTED BY...BENJI HEGG
TYPE OF REQUEST...PRESCRIBED
.TAG 20090910.PETTY.01/MSO