FNUS76 KSEW 181347
FWSSEW

SPOT FORECAST FOR TA 8 PRAIRIE PINE...FT LEWIS FORESTRY
NATIONAL WEATHER SERVICE SEATTLE WA
647 AM PDT TUE AUG 18 2009

FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON AUGUST 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...IT WILL CONTINUE TO WARM UP THROUGH THE MIDDLE OF
THE WEEK AS AN UPPER RIDGE OFFSHORE SHIFTS OVER THE PACIFIC
NORTHWEST. WEDNESDAY WILL BE THE WARMEST DAY WITH THERMALLY
INDUCED LOW PRESSURE AND LIGHT OFFSHORE FLOW. THE UPPER LEVEL
RIDGE AND THERMALLY INDUCED SURFACE LOW PRESSURE WILL SHIFT INLAND
THURSDAY WITH COOLING ON THE COAST. A MARINE PUSH WILL DEVELOP BY
THURSDAY EVENING...COOLING THE INTERIOR OF WESTERN WASHINGTON AS
WELL.

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

.TODAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 85.
 TEMP AT 1000.......AROUND 68.
MIN HUMIDITY........29 PERCENT.
 HUMIDITY AT 1000...NEAR 60 PERCENT.
EYE LEVEL WINDS.....LIGHT WIND BECOMING NORTH 2 TO 4 MPH BY THIS
                    AFTERNOON.
WIND (20 FT)........
 SLOPE/VALLEY.......LIGHT NORTH WIND RISING TO 3 TO 6 MPH THIS
                    AFTERNOON.
MIXING HEIGHT.......200 FT AGL INCREASING TO 4000 FT AGL LATE IN THE
                    MORNING.
TRANSPORT WINDS.....NORTHEAST AROUND 8 MPH.
HAINES INDEX........4 OR LOW.

.TONIGHT...

WIND (20 FT)........
 SLOPE/VALLEY.......NORTH WINDS 5 TO 7 MPH BECOMING LIGHT LATE
                    EVENING HOURS.
MIXING HEIGHT.......4000 FT AGL DECREASING TO 300 FT AGL LATE
                    EVENING.
TRANSPORT WINDS.....NORTHEAST AROUND 7 MPH.

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...
SUNNY. LOWS NEAR 60. HIGHS AROUND 90. LIGHT WIND BECOMING NORTH 5
TO 8 MPH IN THE AFTERNOON.
.THURSDAY...
MOSTLY CLEAR. LOWS AROUND 60. HIGHS IN THE MID 80S. WEST WINDS
AROUND 4 MPH.
.FRIDAY...
PARTLY CLOUDY. LOWS IN THE UPPER 50S. HIGHS IN THE MID 70S.
SOUTHWEST WINDS AROUND 6 MPH.
.SATURDAY...
MOSTLY CLOUDY. LOWS IN THE MID 50S. HIGHS IN THE MID 70S.
NORTHWEST WINDS AROUND 3 MPH.

$$
FORECASTER...CERNIGLIA
REQUESTED BY...DAN LEEPER
TYPE OF REQUEST...PRESCRIBED
.TAG 20090818.TA8PR.01/SEW