FNUS75 KMSO 201542
FWSMSO

SPOT FORECAST FOR PETTY ROCK12
NATIONAL WEATHER SERVICE MISSOULA MT
942 AM MDT TUE APR 20 2010

FORECAST IS BASED ON IGNITION TIME OF 1230 MDT ON APRIL 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...SLIGHTLY WARMER AND DRY CONDITIONS ONCE AGAIN TODAY.
LOW PRESSURE ENTERING THE WEST COAST WILL INCREASE PRESSURE GRADIENTS
AND PRODUCE AN INCREASE IN EAST-SOUTHEAST WINDS ON THE RIDGES THIS
AFTERNOON. EXPECT AN INCREASE IN CUMULUS CLOUDS AFTER 1100.



.TODAY...

SKY/WEATHER.........MOSTLY SUNNY WITH CUMULUS CLOUD DEVELOPMENT.
CWR.................0 PERCENT.
MAX TEMPERATURE.....76-81.
MIN HUMIDITY........17-22 PERCENT.
WIND (20 FT)........
 LWR SLP/VALLEY.....UPSLOPE 2-5 MPH AFTER 1100.
 UPR SLP/RIDGETOP...SOUTHEAST WINDS 5-10 MPH AFTER 1300.
MIXING HEIGHT.......4200 FT AGL.
MIXING WINDS........SOUTHEAST 15 MPH.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
MIN TEMPERATURE.....36-41.
MAX HUMIDITY........80-85 PERCENT.
WIND (20 FT)........
 LWR SLP/VALLEY.....DOWNSLOPE 1-3 MPH.
 UPR SLP/RIDGETOP...SOUTHEAST WINDS 5-8 MPH.
MIXING HEIGHT.......1900 FT AGL.
MIXING WINDS........SOUTHWEST 5 MPH.

.WEDNESDAY...

SKY/WEATHER.........INCREASING CLOUDS DURING THE DAY. CHANCE OF RAIN SHOWERS
                    AND SLIGHT CHANCE OF THUNDERSTORMS AFTER 1200.
CWR.................10 PERCENT.
MAX TEMPERATURE.....68-73.
MIN HUMIDITY........25-32 PERCENT.
WIND (20 FT)........
 LWR SLP/VALLEY.....UPSLOPE 2-4 MPH AFTER NOON.
 UPR SLP/RIDGETOP...SOUTHEAST 2-4 MPH.
MIXING HEIGHT.......4000 FT AGL.
MIXING WINDS........NORTHEAST 5 MPH.

$$
FORECASTER...RPN
REQUESTED BY...JEFF HAYES
TYPE OF REQUEST...PRESCRIBED
.TAG 20100420.PETTY.01/MSO