FNUS75 KMSO 242159
FWSMSO

SPOT FORECAST FOR PETTY ROCK 13
NATIONAL WEATHER SERVICE MISSOULA MT
359 PM MDT SAT SEP 24 2011

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON SEPTEMBER 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...A STRONG COLD FRONT WILL MOVE OVER THE BURN SITE
LATE SUNDAY AFTERNOON PRODUCING GUSTY SOUTHWEST WINDS...CONTINUED
WARM TEMPERATURES AND LOW HUMIDITY READINGS AHEAD OF THIS FRONT.
THE ASPECT OF THE BURN SITE WILL ALLOW SOME SHELTERING FROM THE
RIDGETOP WINDS. EXPECT GUSTS FROM THE RIDGETOP WINDS TO
OCCASIONALLY OVERCOME UPSLOPE WINDS THAT DEVELOP IN THE LOWER
ELEVATIONS. THE INVERSION SHOULD BREAK A LITTLE EARLIER THAN
SATURDAY WITH THE INCREASED WINDS ALOFT. CLOUDS WILL INCREASE
OVERNIGHT WITH TEMPERATURES COOLING AND DECENT HUMIDITY RECOVERIES
BY MONDAY MORNING. THERE WILL ALSO BE A CHANCE FOR SOME LIGHT
PRECIPITATION BY EARLY MONDAY MORNING THROUGH MONDAY...BUT LIKELY
NOT A WETTING RAIN.

.TODAY...

SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....81-86. 56-61 AT 1100.
MIN HUMIDITY........19-24 PERCENT. 45-50 PERCENT AT 1100.
WIND (20 FT)........RIDGETOP SW 8-12 MPH GUSTS TO 15 MPH
    ...UPSLOPE 3-6 MPH BELOW RIDGETOP.
MIXING HEIGHT.......7300 FT AGL.
MIXING WINDS........SOUTHWEST 18 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS.
CWR.................20 PERCENT.
MIN TEMPERATURE.....41-46.
MAX HUMIDITY........84-89 PERCENT.
WIND (20 FT)........RIDGETOP W 6-11 MPH...DOWNSLOPE 1-3 MPH BELOW
    RIDGETOP.
MIXING HEIGHT.......400 FT AGL.
MIXING WINDS........WEST 15 MPH.

.MONDAY...

SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS.
CWR.................10 PERCENT.
MAX TEMPERATURE.....69-73.
MIN HUMIDITY........24-29 PERCENT.
WIND (20 FT)........RIDGETOP WEST 6-10 MPH IN THE AFTERNOON
                    ...UPSLOPE 2-4 MPH BELOW RIDGETOP.
MIXING HEIGHT.......6400 FT AGL.
MIXING WINDS........WEST 15 MPH.

$$
FORECASTER...LOEFFELBEIN
REQUESTED BY...JEFF HAYES
TYPE OF REQUEST...PRESCRIBED
.TAG 20110925.PETTY.01/MSO