Chain controls are in effect along major roadways in the Sierra and there have been delays Tuesday afternoon as a substantial amount of snow falls on Christmas Eve.The KCRA 3 weather team is issuing an Impact Day for Tuesday because of how rain and snow will affect travel and outdoor activities.

Chain controls are in effect along major roadways in the Sierra as a substantial amount of snow falls on Christmas Eve. The KCRA 3 weather team is issuing an Impact Day for Tuesday because of how rain and snow will affect travel and outdoor activities.

A line of cars and trucks lined the Blue Canyon exit headed eastbound on I-80, where roads usually start to get covered in snow.

Snowy weather is hitting Sierra passes between Nevada and California as holiday travelers hit the road. Here's what we know.