FNUS76 KSEW 040020
FWSSEW

SPOT FORECAST FOR HEATWAVE COMPLEX...NPS OLYMPIC
NATIONAL WEATHER SERVICE SEATTLE WA
520 PM PDT MON AUG 3 2009

FORECAST IS BASED ON REQUEST TIME OF 1658 PDT ON AUGUST 03.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...AN UPPER LEVEL RIDGE OF HIGH PRESSURE OVER WESTERN
WASHINGTON CONTINUES TO GRADUALLY WEAKEN AS LOW LEVEL ONSHORE FLOW
GRADUALLY INCREASES. THIS WILL RESULT IN COOLER MAX TEMPERATURES
EACH DAY THROUGH WEDNESDAY. A WEAK WEATHER SYSTEM MOVING NORTHWARD
AND AN UPPER LEVEL TROUGH SINK SOUTHWARD FROM BRITISH COLUMBIA
LATE TUESDAY. AN UPPER LEVEL TROUGH OF LOW PRESSURE OFF THE
CALIFORNIA COAST IS STILL EXPECTED TO SHIFT INLAND LATE WEDNESDAY
OR THURSDAY PRODUCING EVEN COOLER TEMPERATURES AND THE THREAT OF
SHOWERS TO THE REGION.

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

.TUESDAY...
SKY/WEATHER.........PARTLY SUNNY.
MAX TEMPERATURE.....77-82 VALLEYS...73-77 RIDGES.
MIN HUMIDITY........33-38 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......LIGHT AND VARIABLE IN THE MORNING 1 TO 3 MPH
                    IN THE MORNING...BECOMING UPSLOPE/UPVALLEY
                    4 TO 6 MPH WITH GUSTS 7 TO 10 MPH IN THE
                    AFTERNOON.
 RIDGETOP...........WEST TO SOUTHWEST 5 TO 8 MPH.
MIXING HEIGHT.......400 FT AGL INCREASING TO 3600 FT AGL LATE IN
                    THE MORNING.
TRANSPORT WINDS.....SOUTHWEST 4 TO 6 MPH.
HAINES INDEX........4 OR LOW (HIGH LEVEL HAINES).
LAL.................1.

.TUESDAY NIGHT...
SKY/WEATHER.........INCREASING CLOUDINESS OVERNIGHT.
MIN TEMPERATURE.....53-57.
MAX HUMIDITY........80-88 PERCENT VALLEYS...66-78 PERCENT RIDGES PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WESTERLY WINDS 5 TO 8 MPH
 RIDGETOP...........WESTERLY 8 TO 12 MPH.
MIXING HEIGHT.......5300 FT AGL DECREASING TO 400 FT AGL LATE IN
                    THE EVENING.
TRANSPORT WINDS.....WESTERLY 7 TO 10 MPH.
HAINES INDEX........4 OR LOW (HIGH LEVEL HAINES).
LAL.................1.

.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...
MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE LOWER 50S. HIGHS IN THE MID
60S TO LOWER 70S. FREEZING LEVEL 13400 FEET. SOUTHWEST WINDS 8 TO 12 MPH.
.THURSDAY...
MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE LOWER 50S. HIGHS IN
THE MID 60S. FREEZING LEVEL 12300 FEET. WEST WINDS 7 TO 10 MPH.
.FRIDAY...
MOSTLY CLOUDY WITH CHANCE OF SHOWERS. LOWS IN THE UPPER 40S TO LOWER
50S. HIGHS IN THE LOWER TO MID 60S. FREEZING LEVEL 11200 FEET. NORTHWEST
WINDS 5 TO 8 MPH.

$$
FORECASTER...PRANGE
REQUESTED BY...DAN MINDAR
TYPE OF REQUEST...WILDFIRE
.TAG 20090803.HEATW.01/SEW