FNUS75 KMSO 221018
FWSMSO

SPOT FORECAST FOR PETTY ROCK 4
NATIONAL WEATHER SERVICE MISSOULA MT
418 AM MDT FRI MAY 22 2009

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON MAY 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...HIGH PRESSURE WILL STRENGTHEN OVER THE REGION TODAY
WHICH MEANS WARMER TEMPERATURES AND DRIER CONDITIONS THAN THURSDAY.
A WEAK PRESSURE GRADIENT WILL DEVELOP LATE THIS MORNING AND
PRODUCE A LIGHT EAST TO NORTHEAST WINDS IN EXPOSED AREAS AND
RIDGETOPS...OTHERWISE EXPECT LIGHT TERRAIN DRIVEN SLOPE WINDS. A
FEW CUMULUS BUILDUPS WILL OCCUR THIS AFTERNOON.


.TODAY...

SKY/WEATHER.........MOSTLY SUNNY THIS MORNING WITH A FEW CUMULUS
                    BUILDUPS THIS AFTERNOON.
CWR.................0 PERCENT.
MAX TEMPERATURE.....62-67.
MIN HUMIDITY........17-22 PERCENT.
WIND (20 FT)........UPSLOPE 2-4 MPH AT THE MIDSLOPES...
                    NORTHEAST TO EAST 4-8 MPH ON THE RIDGETOPS AND
                    EXPOSED AREAS.
MIXING HEIGHT.......5800 FT AGL.
MIXING WINDS........NORTHEAST TO EAST 5-8 MPH MPH.

.TONIGHT...

CWR.................10 PERCENT.
MIN TEMPERATURE.....43-48.
MAX HUMIDITY........68-73 PERCENT.

.SATURDAY...

SKY/WEATHER.........PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND
                    THUNDERSTORMS IN THE AFTERNOON.
CWR.................10 PERCENT.
MAX TEMPERATURE.....62-67.
MIN HUMIDITY........17-22 PERCENT.
WIND (20 FT)........UPSLOPE/UPVALLEY 4-6 MPH.
MIXING HEIGHT.......6000 FT AGL.
MIXING WINDS........SOUTHWEST 5-8 MPH.

$$
FORECASTER...RPN
REQUESTED BY...LAURA WARD
TYPE OF REQUEST...PRESCRIBED
.TAG 20090522.PETTY.01/MSO