3 p.m.: 1.5 inches of snow have fallen on top of the ice today, for a total storm total topping 7 inches.

City urges residents to get home before dark.

2 p.m.: National Weather Service issues Winter Weather Advisory until 4 a.m. Friday.

Noon: We now have a half-inch of new snow atop the ice atop the old snow.

Cliff Mass has posted: “Well folks, this is not my profession’s finest hour.”

9:30 a.m.: The neighborhoods have a quarter-inch of ice on top of a half-foot of old snow. And it’s now snowing steadily.

Icy tree limbs over power lines.

7:50 a.m.: One Sea-Tac runway now open. But massive delays.

5:45 a.m. The three runways at Sea-Tac airport are closed because of the icy conditions.

The National Weather Service has issued an ice storm warning until noon 2 p.m.:

ICE ACCUMULATIONS…ICE ACCUMULATIONS TWO TO FOUR TENTHS OF AN

INCH THIS MORNING.

MAIN IMPACT…TRAVEL WILL BE SEVERELY IMPACTED. POWER OUTAGES ARE

LIKELY.

Seattle Public Libraries are closed today due to the extreme weather conditions.

Metro continues on weather routes. Check this site for changes to your bus route.

See snow plow routes here.

Live traffic cams here.

Garbage collection has been postponed by at least a day.

From Cliff Mass this morning: “Over the past day and particularly this morning, something relatively unusual and, quite frankly, dangerous is going on outside–a freezing rain/sleet storm.”