FNUS76 KSEW 180230
FWSSEW

SPOT FORECAST FOR CAVNESS UNIT 1...THE NATURE CONSERVANCY
NATIONAL WEATHER SERVICE SEATTLE WA
730 PM PDT WED AUG 17 2011

FORECAST IS BASED ON IGNITION TIME OF 1100 PDT ON AUGUST 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...A SLIGHTLY STRONGER MARINE INFLUENCE
WILL HOLD TEMPERATURES AND HUMIDITIES NEAR NORMAL ACROSS THE AREA WITH
AREAS OF LOW CLOUDS DEVELOPING EACH NIGHT OVER THE LOW LANDS OF
WESTERN WASHINGTON WHICH WILL DISSIPATE THROUGH THE LATE MORNING
HOURS THURSDAY AND FRIDAY.

AN UPPER LEVEL RIDGE WILL DEVELOP FOR THE WEEKEND FOR WARMER AND
DRIER THAN NORMAL CONDITIONS SATURDAY AND SUNDAY. BEYOND
THAT...MODELS HAVE BEEN VERY INCONSISTENT ON THE TIMING AND STRENGTH
OF THE NEXT SYSTEM TO AFFECT THE NORTHWEST. A FRONTAL SYSTEM IS
EXPECTED TO IMPACT THE AREA EITHER MONDAY OR TUESDAY...LEAVING OPEN
THE POSSIBILITY THAT THE WARM AND DRY CONDITIONS WILL LINGER THROUGH
MONDAY.

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

.TODAY...

SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING MOSTLY SUNNY.
MAX TEMPERATURE.....AROUND 74.
MIN HUMIDITY........43 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 3 TO 4 MPH SHIFTING TO THE
                    NORTH 4 TO 6 MPH IN THE AFTERNOON.
MIXING HEIGHT.......600 FT AGL INCREASING TO 5200 FT AGL LATE IN
                    THE MORNING.
TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
MIN TEMPERATURE.....AROUND 50.
MAX HUMIDITY........100 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTH WINDS 4 TO 7 MPH.
MIXING HEIGHT.......5200 FT AGL DECREASING TO 400 FT AGL LATE IN
                    THE EVENING.
TRANSPORT WINDS.....WEST AROUND 7 MPH.

$$
FORECASTER...COOK
REQUESTED BY...MASON MCKINLEY
TYPE OF REQUEST...PRESCRIBED
.TAG 20110818.CAVNE.01/SEW