FNUS75 KMSO 212039
FWSMSO

SPOT FORECAST FOR PETTY ROCK 12  UPDATED
NATIONAL WEATHER SERVICE MISSOULA MT
239 PM MDT WED APR 21 2010

FORECAST IS BASED ON IGNITION TIME OF 1300 PDT ON APRIL 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...AN UPPER LOW IN SOUTHCENTRAL IDAHO WILL CONTINUE TO
SPIN AND USHER CLOUDS NORTHWARD. A SLIGHT CHANCE OF A SHOWER OR EVEN
THUNDERSTORM WILL BE POSSIBLE AFTER 1600 UNDER INCREASING MOISTURE AND
INSTABILITY. GUSTY AND ERRATIC WINDS ARE POSSIBLE IN AND AROUND ANY
SHOWER OR THUNDERSTORM. OTHERWISE VARIABLE LIGHT WINDS 2-4 MPH ARE
POSSIBLE. A BETTER CHANCE OF SHOWERS IS EXPECTED THURSDAY AFTERNOON.

.TODAY...

SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF A RAIN
                    SHOWER AFTER 1600.
CWR.................10 PERCENT.
MAX TEMPERATURE.....74-79.
MIN HUMIDITY........16-21 PERCENT.
WIND (20 FT)........EAST WINDS 5-6 MPH. MIXING HEIGHT.......5400 FT AGL.
MIXING WINDS........EAST 10 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS.
CWR.................10 PERCENT.
MIN TEMPERATURE.....8-13.
MAX HUMIDITY........92-97 PERCENT.
WIND (20 FT)........VARIABLE 2-4 MPH BECOMING NORTHWEST AROUND 5
                    MPH AFTER MIDNIGHT.
MIXING HEIGHT.......900 FT AGL.
MIXING WINDS........NORTH 5 MPH.

.THURSDAY...

SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF RAIN SHOWERS.
CWR.................30 PERCENT.
MAX TEMPERATURE.....60-65.
MIN HUMIDITY........34-39 PERCENT.
WIND (20 FT)........VARIABLE 2-5 MPH BECOMING WEST AROUND 6 MPH IN
                    THE AFTERNOON.
MIXING HEIGHT.......4200 FT AGL.
MIXING WINDS........WEST 10 MPH.

$$
FORECASTER...RPN
REQUESTED BY...LAURA WARD
TYPE OF REQUEST...PRESCRIBED
.TAG 20100421.PETTY.02/MSO