Forecast: Heavy rain overnight-early Thursday

THURSDAY: Expect heavy rain overnight from 1AM to 5AM as our storm sweeps through with chilly 40s to 50s. We'll switch to scattered rain chances 6AM into the evening as the storm moves south and 50s for highs. Look for a 2nd stronger round Saturday morning as an atmospheric river moves into the Bay Area. Details on exactly how much rain to expect in your full Microclimate Forecast VIDEO. Chief Meteorologist Jeff Ranieri