FNUS75 KMSO 072214
FWSMSO

SPOT FORECAST FOR SAWTOOTH
NATIONAL WEATHER SERVICE MISSOULA MT
414 PM MDT FRI SEP 7 2012

FORECAST IS BASED ON IGNITION TIME OF 1555 MDT ON SEPTEMBER 07.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...EXPECT VALLEY INVERSIONS TO BREAK MID TO LATE
AFTERNOON. MOST OF THE DAY RH'S MAY ACTUALLY BE LOWER ON UPPER
SLOPES OF THE FIRE DUE TO THE LATER INVERSION BREAKS AND VERY DRY
AIR ALOFT. DECREASED THE STRENGTH OF THE THERMAL BELTS IN THE
FORECAST DUE TO THE LACK OF LOW RH OBSERVATIONS IN THERMAL BELTS
LAST NIGHT...HOWEVER THE SETUP REMAINS VERY GOOD FOR DEVELOPING
THERMAL BELTS TONIGHT.

.TONIGHT...

SKY/WEATHER.........CLEAR.
CWR.................0 PERCENT.
MIN TEMPERATURE.....39-44 BOTTOM TO 47-52 IN THERMAL BELTS.
MAX HUMIDITY........90-95 PERCENT BOTTOM TO 55-60 PERCENT THERMAL BELTS.
WIND (20 FT)........VARIABLE 1-3 MPH.
MIXING HEIGHT.......600 FT AGL.
MIXING WINDS........VARIABLE 5 MPH.

.SATURDAY...

SKY/WEATHER.........SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....69-74 BOTTOM TO 58-63 TOP.
MIN HUMIDITY........10-15 PERCENT.
WIND (20 FT)........VARIABLE 2-4 MPH...BECOMING WEST AROUND 5
                    MPH IN THE AFTERNOON ON THE RIDGE TOPS.
MIXING HEIGHT.......6400 FT AGL.
MIXING WINDS........WEST 12 MPH.

.SATURDAY NIGHT...

SKY/WEATHER.........CLEAR BECOMING MOSTLY CLOUDY.
CWR.................0 PERCENT.
MIN TEMPERATURE.....41-46 BOTTOM TO 45-50 IN THERMAL BELTS.
MAX HUMIDITY........80-85 PERCENT BOTTOM TO 55-60 PERCENT IN THERMAL BELTS.
WIND (20 FT)........VARIABLE 1-3 MPH.
MIXING HEIGHT.......600 FT AGL.
MIXING WINDS........SOUTHWEST 8 MPH.
$$
FORECASTER...LEACH
REQUESTED BY...KELLY ALLEN
TYPE OF REQUEST...PRESCRIBED
.TAG 20120907.SAWTO.01/MSO