FNUS76 KSEW 151746
FWSSEW

SPOT FORECAST FOR 3 LAKES FIRE...NPS MT RAINER
NATIONAL WEATHER SERVICE SEATTLE WA
1046 AM PDT SAT SEP 15 2012

FORECAST IS BASED ON REQUEST TIME OF 1022 PDT ON SEPTEMBER 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...A WEAK UPPER LEVEL TROUGH WILL MOVE SOUTHEAST ACROSS
THE AREA TODAY WITH LITTLE AFFECT ON THE AREA OTHER THEN SOME HIGH
CLOUDS. FROM SUNDAY ONWARD A LARGE UPPER LEVEL RIDGE OF HIGH PRESSURE
WILL DEVELOP AND DOMINATE THE WEATHER THROUGH THE WEAK PROVIDING WARM
AND DRY WEATHER. A SURFACE THERMAL TROUGH OF LOW PRESSURE WILL
DEVELOP SUNDAY NIGHT AND MONDAY OVER WESTERN WASHINGTON AND LINGER
INTO TUESDAY. THIS WILL CAUSE A LIGHT EASTERLY FLOW ACROSS THE
CASCADES SUNDAY NIGHT THROUGH TUESDAY NIGHT CAUSING POOR OVERNIGHT
HUMIDITY RECOVERIES ACROSS THE RIDGES SUNDAY NIGHT AND LOW MINIMUM
RELATIVE HUMIDITY LEVELS MONDAY.

 FORECAST FOR 20 FOOT WIND SPEED (VALLEYS AND RIDGE TOPS) ARE 10
 MINUTE AVERAGES REFLECTING RAWS WINDS.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....AROUND 67.
MIN HUMIDITY........33 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST TO NORTHWEST WINDS 4 TO 7 MPH.
MIXING HEIGHT.......INCREASING TO 6000 FT AGL THIS AFTERNOON.
TRANSPORT WINDS.....WEST WINDS 5 TO 10 MPH.
HAINES INDEX
     MID LEVEL......6 OR HIGH.
     HIGH LEVEL.....3 OR VERY LOW.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....AROUND 50.
MAX HUMIDITY........75 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHWEST WINDS 4 TO 6 MPH EASING LATE EVENING
                    THEN BECOMING EAST 2 TO 4 MPH LATE.
MIXING HEIGHT.......5400 FT AGL DECREASING TO 700 FT AGL IN
                    THE EVENING.
TRANSPORT WINDS.....NORTHWEST AROUND 6 MPH BECOMING EAST TO 5 MPH.
HAINES INDEX
     MID LEVEL......5 OR HIGH.
     HIGH LEVEV.....3 OR VERY LOW.

.SUNDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 70.
MIN HUMIDITY........28 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHEAST WINDS 3 TO 4 MPH IN THE MORNING
                    BECOMING LIGHT.
MIXING HEIGHT.......700 FT AGL INCREASING TO 5400-5600 FT AGL.
TRANSPORT WINDS.....LIGHT WINDS.
HAINES INDEX
     MID LEVEL......5 OR HIGH.
     HIGH LEVEL.....4 OR LOW.

$$
FORECASTER...CERNIGLIA
REQUESTED BY...STEVE SCOTT
TYPE OF REQUEST...WILDFIRE
.TAG 20120915.3LAKE.01/SEW