From the National Weather Service:

THE NATIONAL WEATHER SERVICE IN SEATTLE HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT FROM 10 AM THIS MORNING TO 4 PM PST
THIS AFTERNOON.

* WIND...SOUTH WIND RISING TO 20 TO 30 MPH WITH GUSTS TO 45
MPH...BECOMING NORTHWEST 15 TO 25 MPH LATE THIS AFTERNOON.

* TIMING...WINDS WILL INCREASE RAPIDLY THIS MORNING...REMAIN
STRONG THROUGH THE AFTERNOON...THEN DIMINISH LATE THIS
AFTERNOON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY IS ISSUED WHEN SUSTAINED WINDS OF 30 TO 39 MPH OR
GUSTS OF 45 TO 57 MPH ARE LIKELY. WINDS THIS STRONG CAN SNAP
SMALL TREE BRANCHES...TOPPLE SMALL OR SHALLOW ROOTED TREES...AND
CAUSE LOCAL POWER OUTAGES.