FNUS75 KMSO 312328
FWSMSO

SPOT FORECAST FOR POWELL SBW COMPLEX
NATIONAL WEATHER SERVICE MISSOULA MT
528 PM MDT FRI AUG 31 2012

FORECAST IS BASED ON REQUEST TIME OF 1544 PDT ON AUGUST 31.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

MONSOON MOISTURE WILL PASS OVER THE WILDFIRE TONIGHT. THERE IS A
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH SUNSET. THE MAIN
IMPACT OF ANY THUNDERSTORM DEVELOPING WILL BE ERRATIC GUSTY WINDS
AND ISOLATED LIGHTNING STRIKES ACROSS THE COMPLEX. A COLD FRONT WILL
MOVE ACROSS THE COMPLEX EARLY SATURDAY...WITH A STIFF NORTHWEST
WIND DEVELOPING DURING THE AFTERNOON. SMOKE WILL CERTAINLY CLEAR UP
AT THE UPPER PORTIONS OF THE FIRE...HOWEVER THE LOWER ELEVATIONS
MAY NOT COMPLETELY CLEAR. WINDS WILL DIMINISH QUICKLY AFTER SUNSET
ON SATURDAY...WITH SMOKE ACCUMULATING IN THE VALLEYS SIMILAR TO
THAT OF THE PAST FEW DAYS.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING MOSTLY CLEAR.
                    SLIGHT CHANCE OF RAIN SHOWERS AND THUNDERSTORMS
                    IN THE EVENING.
CWR.................0 PERCENT.
MIN TEMPERATURE.....TOP...44-49.
                    BOTTOM...40-45.
MAX HUMIDITY........TOP...55-60 PERCENT.
                    BOTTOM...75-80 PERCENT.
WIND (20 FT)........TOP...SOUTHWEST WINDS 5-10 MPH. GUSTS TO 20 MPH
                      IN THE EVENING.
                    BOTTOM...VARIABLE 2-4 MPH.
MIXING HEIGHT.......TOP...1500 FT AGL.
                    BOTTOM...100 FT AGL.
MIXING WINDS........SOUTHWEST 20 MPH.
HAINES INDEX........4 LOW.

.SATURDAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....TOP...67-72.
                    BOTTOM...74-79.
MIN HUMIDITY........TOP...17-22 PERCENT.
                    BOTTOM...22-27 PERCENT.
WIND (20 FT)........TOP...WEST WINDS 7-12 MPH. GUSTS TO 25 MPH IN
                      THE AFTERNOON.
                    BOTTOM...VARIABLE 1-3 MPH BECOMING WEST 4-8 MPH.
                      GUSTS TO 12 MPH IN THE AFTERNOON.
MIXING HEIGHT.......TOP...5800 FT AGL.
                    BOTTOM...8000 FT AGL.
MIXING WINDS........WEST 20 MPH.
HAINES INDEX........4 LOW.

.SATURDAY NIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
MIN TEMPERATURE.....TOP...38-43.
                    BOTTOM...35-40.
MAX HUMIDITY........TOP...70-75 PERCENT.
                    BOTTOM...80-85 PERCENT.
WIND (20 FT)........TOP...WEST WINDS 7-12 MPH.
                    BOTTOM...SOUTHWEST AROUND 5 MPH BECOMING
                      VARIABLE 1-3 MPH.
MIXING HEIGHT.......TOP...1200 FT AGL.
                    BOTTOM...300 FT AGL.
MIXING WINDS........SOUTHWEST 15 MPH.
HAINES INDEX........4 LOW.

$$
FORECASTER...ZUMPFE
REQUESTED BY...ROBERT ZIEL
TYPE OF REQUEST...WILDFIRE
.TAG 20120831.POWEL.01/MSO