https://www.mercurynews.com/2019/12/26/i-5-closed-over-grapevine-because-of-snow/

Interstate 5 over the Grapevine and Interstate 15 at Cajon Pass are closed because of heavy snow and stuck vehicles, the California Highway Patrol said Thursday.

The I-5 closure is a 40-mile stretch between Grapevine and Parker Road in Castaic. The I-15 closure is between Nealeys Corner (Sierra Avenue) and Hesperia.