FNUS76 KSEW 152239
FWSSEW

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

FORECAST IS BASED ON REQUEST TIME OF 1525 PDT ON SEPTEMBER 15.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...AN UPPER LEVEL RIDGE WILL BEGIN TO BUILD ACROSS THE
PACIFIC NORTHWEST SUNDAY AND REMAIN IN CONTROL OF THE WEATHER THROUGH
THE WEAK PROVIDING UNSEASONABLY WARM AND DRY CONDITIONS. A THERMAL
TROUGH OF LOW PRESSURE WILL DEVELOP OVER WESTERN WASHINGTON SUNDAY
NIGHT AND LINGER THROUGH MONDAY NIGHT BEFORE MOVING EAST OF THE
CASCADES TUESDAY. THIS WILL BRING ABOUT POOR OVERNIGHT HUMIDITY
RECOVERIES FOR THE MOUNTAIN RIDGES SUNDAY AND MONDAY NIGHT AS WELL AS
LOW MINIMUM RH VALUES MONDAY. IT WILL ALSO BRING ABOUT AN UNSTABLE
LOW LEVEL AIR MASS THROUGH THAT TIME PERIOD.

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

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....AROUND 49.
MAX HUMIDITY........75 PERCENT.
WIND (20 FT)........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 LEVEL.....3 OR VERY LOW.

.SUNDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 72.
MIN HUMIDITY........30 PERCENT.
WIND (20 FT)........SOUTHEAST WINDS 3 TO 5 MPH 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.03/SEW