Update 6:30 am
Power was still out for more than 500 people in the West Seattle/ White Center area after a powerful wind storm blew through the area overnight reaching gusts of up to 60mph and knocking out the electricity for 47,000 people in Seattle. City Light crews and Seattle Fire and police were busy all night as downed trees fell across roads and brought down wires. Most of the power for West Seattle's Arbor Heights was back on by 3am but more than 5000 still had no juice at 7am. Persistent outages above Alki and along Beach Drive SW were expected to be resolved before noon.

Update 12:10 am oct 26

Power was out for more than 4700 city light customers after high winds hit the Arbor Heights neighborhood and other parts of West Seattle Oct. 25-26. Power was out for more than 47000 across the city.

In West Seattle the outage extended from 122nd to the south and north including Fauntleroy Way SW up Beach Drive to Juneau Street SW. The western reach of the outage extended nearly to 39th SW. A block on Kenyon Street SW was also out between 39th and 41st streets SW.

A tree split in two near 37th SW and SW Ida bringing down power lines. Other trees came down at 34th and Roxbury Street SW. And on Delridge Way SW near the police precinct.

Comcast cable TV and internet were also knocked out around West Seattle with no known time of restoration.

City Light crews were out working to restore power which they estimated would likely be after 3am.

Original post
A high wind warning is in effect for Western Washington through 2am and 120 homes along Beach Drive SW are without power at 8pm due to a fallen tree. 127 more are affected on Alki Ave SW.
East of Delridge Way SW 305 are without power. No cause is yet identified.

City Light crews are working on the issue and expect to have power restored before or by 11pm.

You can check City Light System Status (assuming you have power or a mobile device) here:
http://www.seattle.gov/light/sysstat/