FNUS76 KSEW 241515
FWSSEW

SPOT FORECAST FOR 13TH DIVISION WEST B...FT LEWIS FORESTRY
NATIONAL WEATHER SERVICE SEATTLE WA
815 AM PDT TUE AUG 24 2010

FORECAST IS BASED ON IGNITION TIME OF 1000 PDT ON AUGUST 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...A THERMAL TROUGH OF LOW PRESSURE WILL REMAIN OVER
WESTERN WASHINGTON THROUGH WEDNESDAY MORNING. FOR THE FIRE AREA THIS
WILL RESULT IN RATHER WARM TEMPERATURES AND LOW RELATIVE HUMIDITIES
THIS AFTERNOON. THE LIGHT AND VARIABLE WIND THIS MORNING WILL BECOME
NORTHERLY THIS AFTERNOON WITH NORTH TO NORTHEAST TRANSPORT WINDS.
DUE TO AN UPPER LEVEL INVERSION...THE MIXING HEIGHT WILL BE LOWER
THAN YESTERDAY...GENERALLY BELOW 3000 FT.

WEDNESDAY WILL START OUT SIMILAR TO TODAY WITH A QUICK WARM UP AND
LOW RH VALUES...BUT A WESTERLY BREEZE WILL KICK IN IN THE AFTERNOON
AS ONSHORE FLOW DEVELOPS.

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

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 84.
MIN HUMIDITY........26 PERCENT.
WIND (20 FT)........LIGHT WIND BECOMING NORTH TO NORTHEAST 3 TO
                    4 MPH THIS AFTERNOON.
MIXING HEIGHT.......500 FT AGL INCREASING TO 2800 FT AGL.
TRANSPORT WINDS.....NORTHEAST AROUND 9 MPH.
HAINES INDEX........4 OR LOW.

.TONIGHT...

MIN TEMPERATURE.....AROUND 49.
MAX HUMIDITY........89 PERCENT.
WIND (20 FT)........NORTHEAST WINDS AROUND 3 MPH IN THE EVENING
                    BECOMING LIGHT.
MIXING HEIGHT.......2800 FT AGL DECREASING TO 400 FT AGL LATE IN
                    THE EVENING.
TRANSPORT WINDS.....NORTHEAST AROUND 9 MPH.

.FORECAST DAYS 3 THROUGH 5...
.THURSDAY...
MOSTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE UPPER 60S.
SOUTHWEST WINDS 3 TO 5 MPH.
.FRIDAY...
MOSTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS IN THE MID 60S.
SOUTHWEST WINDS 3 TO 7 MPH.
.SATURDAY...
MOSTLY CLOUDY. LOWS IN THE MID 40S. HIGHS IN THE MID 60S. NORTH
WINDS 3 TO 5 MPH.

$$
FORECASTER...CERNIGLIA
REQUESTED BY...DAN LEEPER
TYPE OF REQUEST...PRESCRIBED
.TAG 20100824.13THD.01/SEW