Interstate 90 is back open after the westbound side closed down for four hours Sunday night.

The highway was closed at Ellensburg because a jack-knifed 18-wheeler was blocking the entire roadway.

A semi and a car were involved on a crash directly behind the jack-knifed truck.

attachment-Image From Washington State Patrol

Westbound I-90 was closed as a result from about 5:15 to 9:15 Sunday night.

WSDOT is reporting three feet of snowpack on the ground at Snoqualmie Pass, with total accumulation of more than 10 feet for the season.

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