Cajon pass is uder a blanket of White as this is written, and I-15 though the pass is closed. Weird. I know the area well due to some railfanning I did in the pass right next to I-15 some years ago.
AP says: 
“Snow closed Interstate 15 through the Cajon Pass northwest of Los Angeles for about five hours Sunday morning. Snow and ice also closed several roads in San Bernardino County, said California Highway Patrol dispatch supervisor Doug Showalter.
As much as a foot of snow covered desert areas of northern San Bernardino County, and 6 inches fell in desert communities such as Yucca Valley and Twentynine Palms. Lake Elsinore, southeast of Los Angeles, measured 3 inches. “