California under flash flood threat, as atmospheric river set to bring several months' worth of rain

California under flash flood threat, as atmospheric river set to bring several months' worth of rain

An atmospheric river will slam California beginning Thursday through early next week, delivering heavy rain, strong wind gusts and potentially feet of mountain snow. Flash Flood Warnings cover San Francisco and the Central Valley. The City of Los Angeles has issued evacuation warnings for areas around the burn scars from January's devastating wildfires.