Update 9:25pm:

Eastbound lanes of I-80 are open. Motorists are moving at 25 mph with a CHP escort. Westbound lanes are estimated to open at 11pm Tuesday.

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A major mudslide triggered by severe thunderstorms late this afternoon closed Interstate 80 about 1.5 miles west of the California-Nevada border.

Caltrans crews said the football field-sized mudslide is covering the lanes in both directions.

It is estimated the mud and debris is 3 to 8 inches deep.

It is not known if any vehicles were caught in the July 2 slide.

Eastbound traffic is being directed off the interstate at Hirschdale Road in Truckee. Westbound traffic is being turned around at the state line. Motorists should use alternate routes.

Eastbound big rigs are being routed on Highway 89 through Loyalton to Highway 395 in Nevada. Westbound big rigs are being routed to Highway 395 through Loyalton to Highway 89 to Truckee.

There is no estimated time for the opening of the interstate. Dump trucks and loaders are already trying to clear the mess.

— Lake Tahoe News staff report