With California Highway Patrol officers providing escorts, drivers carefully made their way through the Grapevine along Interstate 5. The CHP said Interstate 5 may have to be shut down soon, but so far, it remained open.
It was predicted that snow could come down at elevations as low as 2,500 feet.
Drivers headed to the Los Angeles area from Northern California said they've dealt with slippery roads and nerve-wracking conditions.
"I think it was really kind of scary right when we were coming right past Gorman, it was really, really dangerous," said Patricia Madrid of Stockton.
The storm brought strong winds and hail in several areas of the Southland.
The National Weather Service issued a tornado warning until 6:45 p.m. PT for east central Santa Barbara County and west central Ventura County after its doppler radar indicated a tornado near La Conchita, moving east at 25 mph.
The tornado warning was allowed to expire after the thunderstorm weakened.
The California Highway Patrol was forced to shut down the Pasadena (110) Freeway just south of Glenarm Street in Pasadena due to flooding. The closure lasted several hours as crews cleared the roadway.