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153
FNUS76 KSEW 170056
FWSSEW

SPOT FORECAST FOR HAVEN LAKE...WASHINGTON DNR
NATIONAL WEATHER SERVICE SEATTLE WA
556 PM PDT TUE SEP 16 2014

FORECAST IS BASED ON REQUEST TIME OF 1743 PDT ON SEPTEMBER 16.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...ONSHORE FLOW WILL KEEP COOLER TEMPERATURES...HIGHER
RH VALUES AND MORE STABLE AIR OVER WESTERN WASHINGTON TONIGHT. AN
UPPER LEVEL TROUGH WILL BRING SHOWERS WEDNESDAY AND THURSDAY...
WITH THE BEST CHANCES BEING ON THURSDAY AND THE BEST LIKELIHOOD
FOR WETTING RAINS IN THE MID TO HIGH ELEVATIONS. HIGHER PRESSURE
ALOFT IS EXPECTED TO BUILD FRIDAY THROUGH THE WEEKEND FOR A
WARMING AND DRYING TREND AND A RETURN TO OFFSHORE FLOW.

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

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF LIGHT SHOWERS OVERNIGHT.
CWR.................LESS THAN 10%.
MIN TEMPERATURE.....AROUND 53.
MAX HUMIDITY........94 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 3 TO 11 MPH.
MIXING HEIGHT.......1100-2100 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 7 TO 8 MPH.
HAINES INDEX........2 OR VERY LOW.
LAL.................1.

.WEDNESDAY...

SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SHOWERS.
CWR.................LESS THAN 10%.
MAX TEMPERATURE.....AROUND 73.
MIN HUMIDITY........50 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTH WINDS UP TO 3 MPH SHIFTING TO THE EAST 3
TO 5 MPH IN THE AFTERNOON.
MIXING HEIGHT.......1700-2700 FT AGL.
TRANSPORT WINDS.....LIGHT WINDS.
HAINES INDEX........2 OR VERY LOW.
LAL.................1.

$$
FORECASTER...BUEHNER
REQUESTED BY...LAURIE COX
TYPE OF REQUEST...WILDFIRE
.TAG 20140916.HAVEN.01/SEW







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