FNUS76 KSEW 211548
FWSSEW

SPOT FORECAST FOR SOUTH WEIR...FORT LEWIS-MCCHORD
NATIONAL WEATHER SERVICE SEATTLE WA
848 AM PDT WED AUG 21 2013

FORECAST IS BASED ON IGNITION TIME OF 1200 PDT ON AUGUST 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...AN UPPER LEVEL RIDGE WILL BUILD OVER WESTERN
WASHINGTON TODAY FOR A SLIGHTLY WARMER AND DRY AIR MASS. LOW LEVEL
NORTH TO NORTHEAST FLOW WILL INCREASE ACROSS THE LOWLANDS TODAY...
LEADING TO GUSTY AFTERNOON AND EVENING SURFACE WINDS. THE LOWER RELATIVE
HUMIDITIES COMBINED WITH THE STRONGER NORTHERLY FLOW WILL ENHANCE
THE BURNING ENVIRONMENT. POOR HUMIDITY RECOVERIES ARE EXPECTED
ABOVE THE NIGHTTIME INVERSION TONIGHT.

A COOLING TREND WILL DEVELOP FROM LATE THURSDAY THROUGH THE
WEEKEND...AS THE UPPER LEVEL RIDGE MOVES EAST AND A BROAD UPPER
LEVEL TROUGH MOVES SLOWLY INLAND. A WEAK COLD FRONT ASSOCIATED WITH
THE TROUGH WILL REACH THE WASHINGTON COAST FRIDAY AFTERNOON FOR A
CHANCE OF SHOWERS. RELATIVE HUMIDITIES WILL INCREASE AND
TEMPERATURES WILL COOL AS THE TROUGH MOVES OVERHEAD.

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

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 82.
MIN HUMIDITY........33 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHEAST WINDS 4 TO 10 MPH GUSTS 15 MPH.
MIXING HEIGHT.......500 FT AGL INCREASING TO 2500-2700 FT AGL LATE
                    IN THE MORNING.
TRANSPORT WINDS.....NORTHEAST AROUND 11 MPH.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLEAR.
MIN TEMPERATURE.....AROUND 50.
MAX HUMIDITY........100 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHEAST WINDS 3 TO 8 MPH.

.THURSDAY...

SKY/WEATHER.........MOSTLY SUNNY.
MAX TEMPERATURE.....AROUND 84.
MIN HUMIDITY........37 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHEAST WINDS 3 TO 8 MPH.

$$
FORECASTER...KAM
REQUESTED BY...DAVE CLOUSE
TYPE OF REQUEST...PRESCRIBED
.TAG 20130821.SOUTH.01/SEW