FNUS76 KSEW 191451
FWSSEW

SPOT FORECAST FOR LOWER WEIR PRAIRIE...FT LEWIS FORESTRY
NATIONAL WEATHER SERVICE SEATTLE WA
751 AM PDT THU AUG 19 2010

FORECAST IS BASED ON IGNITION TIME OF 1300 PDT ON AUGUST 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...ONSHORE FLOW WILL CONTINUE TO REINFORCE A DEEP AND
STUBBORN MARINE LAYER THAT WAS IN PLACE THIS MORNING. IT WILL TAKE
UNTIL AT LEAST MID AFTERNOON TO SEE BREAKS DEVELOPING IN THE
OVERCAST. THE MARINE LAYER WILL BE CAPPED BY AN EXTREMELY STABLE
SUBSIDENCE INVERSION AROUND 3000 FT AGL.

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

.TODAY...

SKY/WEATHER.........CLOUDY AT IGNITION TIME. CLEARING AROUND
                    1400 TO 1500 PDT.
CWR.................0%.
MAX TEMPERATURE.....AROUND 69.
MIN HUMIDITY........57 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 4 OR 5 MPH...BRIEFLY BECOMING
                    NORTHWEST LATE THIS AFTERNOON.
MIXING HEIGHT.......INCREASING TO 3000 FT AGL THIS AFTERNOON.
                    MIXED LAYER CAPPED BY SUBSIDENCE INVERSION.
TRANSPORT WINDS.....SOUTHWEST AROUND 4 TO 7 MPH.
HAINES INDEX........MID-LEVEL....4 OR LOW.
                    HIGH-LEVEL...4 OR LOW.

.TONIGHT...

MIN TEMPERATURE.....AROUND 51.
MAX HUMIDITY........96 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 2 TO 4 MPH.
MIXING HEIGHT.......3000 FT AGL DECREASING TO 500 FT AGL LATE IN
                    THE EVENING.
TRANSPORT WINDS.....SOUTHWEST AROUND 4 TO 7 MPH.
HAINES INDEX........MID-LEVEL....3 OR VERY LOW.
                    HIGH-LEVEL...4 OR LOW.

$$
FORECASTER...HANER
REQUESTED BY...DAN LEEPER
TYPE OF REQUEST...PRESCRIBED
.TAG 20100819.LOWER.01/SEW