An atmospheric river storm is pounding parts of California with torrential rain, strong winds and snow that is leading to issues from San Francisco to Los Angeles, including areas impacted by wildfires.

A powerful storm dropping drenching rain on flood-prone Southern California is raising concern among forecasters that it could produce a dangerous, widespread outbreak of tornadoes, damaging winds and fires along with a blizzard as it crosses the entire United States in the coming days.

Evacuation warnings and orders have been issued for Los Angeles communities near the Eaton, Palisades and Sunset fire burn zones ahead of the rain.

A flood watch is still in effect for parts of California where heavy rain in burned areas is creating landslide concerns, forcing thousands to evacuate. CBS News correspondent Carter Evans reports on the conditions and CBS News Philadelphia meteorologist Grant Gilmore has a look at the forecast.