https://www.mercurynews.com/2019/12/27/map-i-5-still-closed-by-snow-southern-california-travel-restrictions-updated/

LOS ANGELES (AP) — A cold and blustery winter storm unleashed downpours and extensive snowfall on Southern California, triggering a tornado and snarling post-Christmas travel on major routes Thursday.

Snow shut down Interstate 5 over Tejon Pass north of Los Angeles and Interstate 15 over Cajon Pass in the inland region to the east. Both passes are at about 4,000 feet elevation.