FNUS75 KMSO 152011
FWSMSO

SPOT FORECAST FOR SELWAY FALLS CABIN
NATIONAL WEATHER SERVICE MISSOULA MT
211 PM MDT TUE SEP 15 2009

FORECAST IS BASED ON IGNITION TIME OF 1300 PDT ON SEPTEMBER 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...MID-LEVEL MOISTURE FROM AN EXITING WEATHER SYSTEM IN
THE GREAT BASIN MAY LEAD TO CUMULUS BUILD-UP THIS AFTERNOON THROUGH
EARLY EVENING. ATMOSPHERIC CONDITIONS WILL QUICKLY STABILIZE AFTER
SUNSET TONIGHT AS HIGH PRESSURE DOMINATES THROUGH WEDNESDAY. THIS WILL
HELP TO DRY THE ATMOSPHERE AND RE-ESTABLISH SURFACE INVERSIONS...
RESULTING IN WEAK WINDS AND POOR MIXING...DEVELOPMENT OF THERMAL BELTS
AND POOR HUMIDITY RECOVERIES IN HIGHER TERRAIN. ON THURSDAY A LOW
PRESSURE SYSTEM IS EXPECTED TO TRACK ACROSS NORTHWEST MONTANA BRINGING
THE POTENTIAL FOR SHOWERS AND THUNDERSTORMS AND INCREASING WEST WINDS.


.TODAY...

SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....BOTTOM 87-92. TOP 75-79.
MIN HUMIDITY........BOTTOM 20-25 PERCENT. TOP 26-31 PERCENT.
WIND (20 FT)........UPSLOPE 3-6 MPH...RIDGETOP GUSTS TO 10 MPH LATE IN
                    THE AFTERNOON.
MIXING HEIGHT.......2600 FT AGL.
MIXING WINDS........NORTHEAST 5 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
MIN TEMPERATURE.....BOTTOM 49-54. TOP 46-51.
MAX HUMIDITY........BOTTOM 86-91 PERCENT. TOP 77-82 PERCENT.
WIND (20 FT)........DOWNSLOPE 1-3 MPH...VARIABLE TO 8 MPH IN THE
                    THERMAL BELT.
MIXING HEIGHT.......400 FT AGL.
MIXING WINDS........SOUTHEAST 5 MPH.

.WEDNESDAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....BOTTOM 89-94. TOP 77-81.
MIN HUMIDITY........BOTTOM 16-21 PERCENT. TOP 22-27 PERCENT.
WIND (20 FT)........UPSLOPE 2-5 MPH...BECOMING SOUTH 5-7 MPH WITH
                    RIDGETOP GUSTS TO 10 MPH IN THE AFTERNOON.
MIXING HEIGHT.......2600 FT AGL.
MIXING WINDS........SOUTHEAST 15 MPH.

$$
FORECASTER...DEROSA/BAUCK
REQUESTED BY...JBROGAN
TYPE OF REQUEST...PRESCRIBED
.TAG 20090915.SELWA.01/MSO