New post on http://twitter.com/caltransdist3 : TrafficAlert Snow starting to fall on I-80 at Donner Pass. Chain controls now in effect Drum to Donner Lake Interchange and on Hwy 20 Vista Point to Washington Rd. Get ready for more chain controls on other Sierra roadways - it will be a snowy night in the Sierra! Take it slow.. http://pic.twitter.com/kx19VIAyu7