Chains are mandatory over the main Sierra passes -- Donner Summit on Interstate 80 and Echo Summit on U-S 50.
Motorists also will need chains or snow tires through Washoe
Valley 14 miles south of Reno to Carson city.
Chains or snow tires also are required on U-S 50 just west of
Carson City, on Kingsbury Grade and on the Mount Rose Highway
leading to Lake Tahoe and on most other Sierra highways.
Forecasters are calling for four to six inches of snow around
Tahoe by evening with up to nine inches at the higher elevations.
An inch or so could accumulate in the foothills just above the