FNUS75 KMSO 190035
FWSMSO

SPOT FORECAST FOR CLARK CANYON WILLOW
NATIONAL WEATHER SERVICE MISSOULA MT
635 PM MDT SUN APR 18 2010

FORECAST IS BASED ON IGNITION TIME OF 1900 MDT ON APRIL 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...WE ARE LOOKING AT A RIDGE OF HIGH PRESSURE
DEVELOPING OVER SOUTHWEST MONTANA TONIGHT AND MONDAY FOR WHAT
SHOULD BE A WARM DRY PERIOD. A SOUTHEASTERLY GENERAL WIND FLOW
WILL CHANNEL THROUGH THE CANYON MONDAY...STRENGTHENING DURING THE
LATTER HALF OF THE AFTERNOON.

-OUTLOOK ON TUESDAY...THE FLOW ALOFT BECOMES MORE SOUTHERLY AS A
LARGE LOW PRESSURE SYSTEM MOVES ONTO THE WEST COAST. THE
ATMOSPHERE WILL BECOME INCREASINGLY MORE UNSTABLE AS SOUTH WINDS
PUMP WARM AIR NORTHWARD. MOISTURE (PRECIPITATION) LOOKS LIKE IT
MAY BE LATE IN ARRIVING...POSSIBLY NOT UNTIL THE EARLY EVENING
HOURS. THIS SHOULD GIVE RELATIVE HUMIDITY A CHANCE TO LOWER WITH
AFTERNOON HEATING...BEFORE CLOUDS INCREASE.

..THIS EVENING...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
                    TEMPERATURE.........60-65....COOLING QUICKLY INTO THE 50S AFTER SUNSET.
MIN HUMIDITY........14-19 PERCENT.
WIND (20 FT)........EAST TO SOUTHEAST WINDS 5-6 MPH...OCCASIONAL GUSTS
                    TO 15 MPH.
MIXING HEIGHT.......4000 FT AGL...COLLAPSING TO 1200 FT BY NIGHTFALL
MIXING WINDS........SOUTH 10-15 MPH.

TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
MIN TEMPERATURE.....34-39.
MAX HUMIDITY........82-90 PERCENT.
WIND (20 FT)........WEST 2-4 MPH.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........LIGHT AND VARIABLE.

.MONDAY...

SKY/WEATHER.........MOSTLY SUNNY.
CWR.................0 PERCENT.
MAX TEMPERATURE.....67-72.
MIN HUMIDITY........12-17 PERCENT.
WIND (20 FT)........EAST TO SOUTHEAST WINDS 5-6 MPH. INCREASING TO 10-15
                    MPH WITH OCCASIONAL GUSTS TO 20 MPH BY MID-AFTERNOON.
MIXING HEIGHT.......7000 FT AGL.
MIXING WINDS........SOUTH 10 MPH.

$$
FORECASTER...MSJ
REQUESTED BY...GEORGE JOHNSON
TYPE OF REQUEST...PRESCRIBED
.TAG 20100418.CLARK.03/MSO