FNUS76 KSEW 150426
FWSSEW

SPOT FORECAST FOR HANCOCK...SOUTH PUGET SOUND DISPATCH
NATIONAL WEATHER SERVICE SEATTLE WA
926 PM PDT SAT AUG 14 2010

FORECAST IS BASED ON REQUEST TIME OF 914 PM PDT ON AUGUST 14.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE IN SEATTLE.

.DISCUSSION...A CRITICAL FIRE WEATHER EPISODE FOR WESTERN WASHINGTON
IS ONGOING AND WILL CONTINUE THROUGH MONDAY. LIGHT TO MODERATE
EAST WINDS WILL CONTINUE UNTIL MONDAY MORNING...MAINTAINING THE FLOW
OF HOT AND DRY CONTINENTAL AIR.

ALL THE WHILE...A THERMAL PRESSURE TROUGH IS LOCATED NEAR THE
COAST THIS AFTERNOON. IT WILL MOVE INLAND OVER THE OLYMPIC
PENINSULA SUNDAY AND REACH THE I-5 CORRIDOR ON MONDAY. THIS WILL
BRING A DRY AND UNSTABLE LOW-LEVEL ENVIRONMENT WITH MID-LEVEL HAINES
4 TO 6 CONDITIONS ACROSS WESTERN WASHINGTON THROUGH MONDAY. THIS IS
A HISTORICALLY STRONG INDICATOR OF LARGE FIRE GROWTH IN WESTERN
WASHINGTON WHEN FUELS ARE DRY ENOUGH.

AS THE THERMAL PRESSURE TROUGH CREEPS INLAND ON SUNDAY AND
MONDAY...MUCH COOLER MARINE AIR WILL MOVE ONTO THE BEACHES ON SUNDAY
AND INTO THE CHEHALIS VALLEY ON MONDAY.

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

.REST OF TONIGHT...

SKY/WEATHER.........CLEAR.
MIN TEMPERATURE.....AROUND 68.
MAX HUMIDITY........44 PERCENT.
WIND (EYE LEVEL)....EAST WINDS 9 TO 12 MPH.
WIND (20 FT)........
 LWR SLP/VALLEY.....EAST WINDS 9 TO 12 MPH.
HAINES INDEX........4 OR LOW.
LAL.................1.

.SUNDAY...

SKY/WEATHER.........SUNNY.
MAX TEMPERATURE.....AROUND 92.
MIN HUMIDITY........28 PERCENT.
WIND (EYE LEVEL)....SOUTHEAST WINDS 5 TO 12 MPH.
WIND (20 FT)........
 LWR SLP/VALLEY.....SOUTHEAST WINDS 5 TO 12 MPH.
HAINES INDEX........4 OR LOW.
LAL.................1.

$$

FORECASTER...MCDONNAL
REQUESTED BY...LINDA N  SHAFFER
TYPE OF REQUEST...WILDFIRE
.TAG 20100814.HANCO.01/SEW