The West Coast is braced for an atmospheric river event that threatens flash flooding and power outages from heavy rain and snow, making travel conditions hazardous or even impossible for some commuters.

Dangerous, heavy rain pounded the Los Angeles area early Thursday, bringing a threat of flooding and debris flow to spots impacted by the recent devastating wildfires. A confirmed EF-0 tornado touched down in Pico Rivera in east LA overnight,

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.