During the height of the rain, streets looked like virtual rivers.
Heavy downpour caused a small mudslide in rain-soaked Glendora on Saturday morning.
The National Weather Service has issued flash flood watches through Saturday evening across Los Angeles and Ventura counties.
The first day of spring arrived with a bang in Southern California, bringing heavy snow to the mountains and illuminating the sky with flashes of lightning from Santa Barbara to downtown Los Angeles.
A winter storm pounding Los Angeles County has brought hail and rain to the region, as well as snow to the Cajon Pass along Interstate 15 and Interstate 5 through the Grapevine.
A powerful winter storm dumped about a half-inch of rain on Los Angeles and forecasters say more wet, messy weather is expected.
Flash flood warnings are in effect for northeastern and south central Los Angeles counties as a result of torrential rainfall, according to the National Weather Service.
Southern California will be hit especially hard by the storms, and officials are preparing for flooding and posting mudflow warnings for burn areas in the San Gabriel Mountains and in Malibu.