I am hoping someone can help me out here. I am planning on driving from L.A. to Slat Lake City, on I-15 up through Vegas, on December 17th. I have never driven this route before and am kind of nervous about the weather. I have driven on 1-80 from Sacramento to Slat Lake City many times, and a few times in very bad snow, and I am hoping to avoid that on I-15. Can anyone give me any insight into what to expect along this route. Thank you very much.