Schools closed, delayed by snow across W. Wash.

Schools closed, delayed by snow across W. Wash.
Troopers respond to a jackknifed semi rig on I-5 in Skagit County.
School districts around Western Washington were announcing closures or delays as snow continued falling around much of the region Thursday morning.

Subfreezing temperatures combined with ice and snow to make driving conditions hazardous, especially in Skagit, Island and Snohomish counties.

School closures and delays were announced in Clallam, Cowlitz, Grays Harbor, Island, Jefferson, King, Kitsap, Lewis, Mason, Pacific, Pierce, Skagit, Snohomish and Thurston counties. All Seattle public schools were closed.

• See a complete list of school closure and delays »

Hardest hit was Skagit County. One photo showed a car buried under 30 inches of snow in Mount Vernon while Burlington had near 20-24 inches of snow and Sedro-Woolley had 12 inches.

Varying amounts of snow fell in other parts of Western Washington - 10 inches at Concrete, 5 inches at Duvall, 3 inches at Sea-Tac Airport and just a trace in downtown Seattle.

Weather Service meteorologist Art Gaebel in Seattle says snow showers are tapering off, to be followed by a hard freeze Thursday and Friday nights with lows in the 20s and teens.

A winter weather advisory continues for all of the Puget Sound region through noon Thursday.

This is a developing news story. More information will be posted as it becomes available.