A deep low moved north along the Washington coast but weakened with time.  The strongest winds occurred inland from about Tacoma north.  A Seattle Times article said there were 246,000 power customers affected, which would make this the highest impact storm of the season by a small margin.
Here is a Seattle Times article:
Vashon Highway Southwest between Southwest 112th Street and 116th Street is closed because of downed power lines.
The storm impacted nearly 246,000 customers.
Redmond police said 160th Avenue Northeast, between Northeast 83rd and Northeast 85th, remained closed Friday morning after scaffolding outside an apartment building under construction fell Thursday night.
The Point Defiance/Tahlequah ferry route is out of service until further notice because of storm damage to the Tahlequah terminal, according to Washington State Ferries. The alternate route is the North Vashon terminal.
Update at 6 a.m.: Puget Sound Energy says about 53,000 customers are without power in the utility���s service area.
Meanwhile, several school districts are closing schools or starting late as a result of power outages and blocked roads. Check here for updates.
The tree that was blocking Highway 203 at 124th Street Northeast, south of Duvall, has been cleared.
Original post: Utility crews are making progress in restoring power to tens of thousands of homes and businesses in Western Washington that lost power during last night���s windstorm.
Puget Sound Energy reported about 66,000 customers were still without power as of 4:30 a.m. Friday, down from a peak of nearly 105,000 at 1 a.m. Seattle City Light said just under 2,500 were in the dark as of 4:30 a.m.
The Snohomish County Public Utility District reported about 26,000 customers were without power.
Some school districts are observing modified schedules as a result of the storm.
In the Northshore School District, Timbercrest Junior High and Bear Creek and East Ridge elementary schools are closed Friday due to road closures and power outages. All other district schools will open two hours later than normal.
In the Everett School District, Everett High and Emerson and Woodside elementaries will be closed.
South Whidbey School District is closed.
In the Bethel School District in Pierce County, Roy Elementary School will start two hours late. The Toledo School District in Lewis County is also starting school two hours late.
Several streets are blocked by trees or debris, including state Highway 9 a mile north of Finn Settlement Road north of Arlington. Also, Highway 203 at 124th Street Northeast, south of Duvall, is blocked by a tree.
Officials say a tree fell onto the casino���s 18,000-gallon propane tank and started a large fire roughly 30 feet from the casino.
Winds have gradually died down. Thursday night, the National Weather Service recorded gusts of 50 mph at Seattle���s Alki Beach, 61 mph on Camano Island and 69 mph at the Whidbey Island Naval Air Station.

High Wind in SEATTLE AND VICINITY, WASHINGTON
From 11-DEC-14 19:30:00 to 11-DEC-14 23:40:00 (PST-8)
Magnitude: 38.00 MS
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Mesonet

Evergreen Point Floating Bridge had 40-44 mph sustained wind.
Point Robinson had 41 mph sustained wind.  Some school districts had to cancel class, others started late.

High Wind in TACOMA AREA, WASHINGTON
From 11-DEC-14 19:58:00 to 11-DEC-14 21:58:00 (PST-8)
Magnitude: 50.00 MG
Property damage: 500.00K
Crop damage: 0.00K
Reported by: ASOS

KTCM had 33g58 mph in an observation.  A home in Gig Harbor had a tree fall on it.

High Wind in HOOD CANAL AREA, WASHINGTON
From 11-DEC-14 21:20:00 to 11-DEC-14 23:20:00 (PST-8)
Magnitude: 40.00 MS
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Department of Highways

Hood Canal Bridge had 40-46 mph sustained wind with 58-63 mph gusts.  Power outages caused an estimated 500,000 in damage costs to the power utilities.

High Wind in EVERETT AND VICINITY, WASHINGTON
From 11-DEC-14 21:53:00 to 11-DEC-14 23:53:00 (PST-8)
Magnitude: 39.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

KPAE had 40-45 mph sustained wind with 59-62 mph gusts.

High Wind in CENTRAL COAST, WASHINGTON
From 11-DEC-14 20:01:00 to 11-DEC-14 22:01:00 (PST-8)
Magnitude: 38.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

KHQM and WPT had 40-44 mph sustained wind.

High Wind in WESTERN WHATCOM COUNTY, WASHINGTON
From 11-DEC-14 20:54:00 to 12-DEC-14 00:12:00 (PST-8)
Magnitude: 43.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Sandy Point Shores, KBLI, Bellingham mesonet, Ferndale all had high wind, 40-50 mph sustained with gusts in the 60s and a few gusts in the 70s.

High Wind in WESTERN SKAGIT COUNTY, WASHINGTON
From 11-DEC-14 23:25:00 to 12-DEC-14 01:25:00 (PST-8)
Magnitude: 35.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Mount Vernon had 40g58 mph.

High Wind in SAN JUAN, WASHINGTON
From 11-DEC-14 20:08:00 to 11-DEC-14 22:38:00 (PST-8)
Magnitude: 46.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Lopez Island had 40-53 mph sustained wind with 60-63 mph gusts.

High Wind in ADMIRALTY INLET AREA, WASHINGTON
From 11-DEC-14 19:45:00 to 11-DEC-14 23:40:00 (PST-8)
Magnitude: 40.00 MS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

KNUW and Freeland had 40-46 mph sustained gusting 59-68 mph.

Strong Wind in SOUTHWEST INTERIOR, WASHINGTON
From 11-DEC-14 20:00:00 to 11-DEC-14 22:00:00 (PST-8)
Magnitude: 43.00 EG
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Newspaper

In Kelso, a 61-year-old man was taken to a hospital after a tree broke through the rafters of his house and hit him in his garage.  Power companies estimate about 1 million in damage costs.

Strong Wind in EAST PUGET SOUND LOWLANDS, WASHINGTON
From 11-DEC-14 20:00:00 to 11-DEC-14 22:00:00 (PST-8)
Magnitude: 43.00 EG
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Newspaper

Power companies estimate about 1/2 million in damage costs.