FNUS75 KMSO 211509
FWSMSO

SPOT FORECAST FOR SAWMILL EMB
NATIONAL WEATHER SERVICE MISSOULA MT
909 AM MDT TUE APR 21 2009

FORECAST IS BASED ON IGNITION TIME OF 1100 MDT ON APRIL 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...AN UPPER LEVEL RIDGE OF HIGH PRESSURE WILL KEEP
SUNNY CONDITIONS OVER THE BURN TODAY. TEMPERATURES AND RELATIVE
HUMIDITIES WILL RUN WARMER AND DRIER THAN YESTERDAY. WHEN
INVERSION BREAKS THIS AFTERNOON AROUND 1400 MDT...THE ATMOSPHERE
WILL DESTABILIZE AND ALLOW FOR WINDS TO MIX TO THE SURFACE. THIS
WILL BE ESPECIALLY TRUE FOR THE TOP OF YOUR BURN AREA.
TOMORROW...TEMPERATURES AND RH WILL COOL/MOISTEN UP A BIT OVER
CONDITIONS TODAY AHEAD OF AN APPROACHING UPPER LEVEL TROUGH. AS
THE RIDGE FLATTENS...WINDS WILL INCREASE FROM THE WEST ONCE AGAIN
TOMORROW AFTERNOON. INVERSION IS EXPECTED TO BREAK EARLIER
TOMORROW. THERE IS A CHANCE OF PRECIPITATION BY WEDNESDAY NIGHT.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....BOTTOM 78-83...TOP 73-78.
MIN HUMIDITY........BOTTOM 13-18 PERCENT...TOP 17-22 PERCENT.
WIND (20 FT)........UPSLOPE 3-6 MPH BECOMING WEST TO NORTHWEST 7-12 MPH IN THE
                    AFTERNOON. GUSTS UP TO 20 MPH ON THE TOP.
MIXING HEIGHT.......5000 FT AGL.
MIXING WINDS........WEST 20 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR BECOMING PARTLY CLOUDY.
CWR.................0 PERCENT.
MIN TEMPERATURE.....BOTTOM 39-44...TOP 42-47.
MAX HUMIDITY........BOTTOM 62-67 PERCENT...TOP 57-62 PERCENT.
WIND (20 FT)........WEST WINDS 5-10 MPH WITH GUSTS TO 18 MPH ON TOP IN THE
                    EARLY EVENING. BECOMING DOWNSLOPE 1-4 MPH AFTER 2100 MDT.
MIXING HEIGHT.......400 FT AGL.
MIXING WINDS........SOUTHWEST 5 MPH.

.WEDNESDAY...

SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....BOTTOM 71-76...TOP 68-73.
MIN HUMIDITY........BOTTOM 17-22 PERCENT...TOP 21-26 PERCENT.
WIND (20 FT)........UPSLOPE 3-6 MPH BECOMING WEST TO NORTHWEST WINDS 7-13 MPH. GUSTS
                    TO 25 MPH ON TOP.
MIXING HEIGHT.......5000 FT AGL.
MIXING WINDS........WEST 30 MPH.

$$
FORECASTER...VIA
REQUESTED BY...JEFFREY HAYES
TYPE OF REQUEST...PRESCRIBED
.TAG 20090421.SAWMI.01/MSO