UPDATE 11:40 pm - Interstate 90 has been reopened in both directions.  The interstate is seeing active snowfall at this hour and has packed ice and snow on the road.  Chain controls are in effect over Snoqualmie Pass.

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UPDATE 8:30 pm - A 72 mile stretch of Interstate 90 over the Cascade Mountains is shut down in both directions because of multiple weather-related crashes and spin outs, the state Department of Transportation reports.

The closure stretches from just west of the Interstate 82 interchange in Ellensburg through North Bend, which is about 15 miles west of the Snoqualmie Pass summit.

There is no estimate on when the road will reopen to traffic.  WSDOT officials say the agency will evaluate conditions at midnight Wednesday.

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Westbound lanes of Interstate 90 are closed near Ellensburg because of a crash.

A crashed semi-truck near the town of Easton has blocked all westbound traffic and there's no detour available, according to the Washington State Patrol.

There's no estimate for when the road will reopen, but workers from the state Department of Transportation and the WSP are working to clear the semi.