FNUS75 KMSO 211551
FWSMSO

SPOT FORECAST FOR PETTY ROCK 12
NATIONAL WEATHER SERVICE MISSOULA MT
951 AM MDT WED APR 21 2010

FORECAST IS BASED ON IGNITION TIME OF 0810 MDT ON APRIL 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...UPPER LOW IN SOUTHCENTRAL IDAHO WILL INCREASE CLOUD COVER
TODAY OVER THE BURN AREA...RESULTING IN WARM TEMPERATURES AND HIGHER
RHS THAN YESTERDAY. INSTABILITY WILL INCREASE THIS AFTERNOON TO
PRODUCE A SLIGHT CHANCE FOR SHOWERS AND A THUNDERSTORM FROM 1500-2000.
A BETTER CHANCE OF SHOWERS IS EXPECTED THURSDAY.

NOTE: THUNDERSTORMS CAN PRODUCE GUSTY AND ERRATIC WINDS.

.TODAY...

SKY/WEATHER.........MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN SHOWERS
                    AND THUNDERSTORMS IN THE AFTERNOON.
CWR.................10 PERCENT.
MAX TEMPERATURE.....74-79.
MIN HUMIDITY........16-21 PERCENT.
WIND (20 FT)........EAST WINDS 3-5 MPH.
MIXING HEIGHT.......5400 FT AGL.
MIXING WINDS........EAST 10 MPH.

.TONIGHT...

SKY/WEATHER.........RAIN SHOWERS LIKELY AND CHANCE OF THUNDERSTORMS
                    IN THE EVENING...THEN CHANCE OF RAIN SHOWERS
                    AFTER MIDNIGHT.
CWR.................30 PERCENT.
MIN TEMPERATURE.....36-41.
MAX HUMIDITY........91-96 PERCENT.
WIND (20 FT)........BECOMING NORTHWEST AROUND 3-7 MPH AFTER MIDNIGHT.
MIXING HEIGHT.......900 FT AGL.
MIXING WINDS........NORTH 5 MPH.

.THURSDAY...

SKY/WEATHER.........CHANCE OF RAIN SHOWERS IN THE MORNING...THEN
                    RAIN SHOWERS LIKELY IN THE AFTERNOON.
CWR.................30 PERCENT.
MAX TEMPERATURE.....58-63.
MIN HUMIDITY........34-39 PERCENT.
WIND (20 FT)........WEST AROUND 3-7 MPH.
MIXING HEIGHT.......4200 FT AGL.
MIXING WINDS........NORTHWEST 5 MPH.

$$
FORECASTER...RPN
REQUESTED BY...JEFF HAYES
TYPE OF REQUEST...PRESCRIBED
.TAG 20100421.PETTY.01/MSO