A cold storm system will bring a threat of snow showers to Southwest California through the evening, with snow
levels locally falling to 1500 feet or lower.
There is the potential for brief snow showers in some areas that rarely see snow, such as the higher valleys of Los Angeles and Ventura counties, foothills, and Santa Monica mountains.
Many roads will be affected due to the very low-elevation snow levels.
Total snow accumulations of 1 to 2 inches, highest in the foothills. Snow levels lowering to 1500 to 2000 feet during the day.
National Weather Service Los Angeles/Oxnard CA 21 Feb 2019
Thanks to Kenneth Lund for this link