The same storm system driving severe weather elsewhere in the country this week is fueling one of the most widespread and potent rounds of rain in Southern California since the historic January fires.

Several areas in Southern California could have scattered showers throughout the day, but the potential for "damaging flooding" will not increase until the evening to overnight hours.

A colossal storm is threatening to bring severe weather to much of California this week and could impact travel over the Grapevine. Here's what to know.