weather September 15, 2021 5:24 pm Jeff's Forecast: Cooling and NorCal Rain Chances Chief Meteorologist Jeff Ranieri tracks the cooler weather moving in and the rain chances over NorCal this weekend in your Microclimate Forecast. US & World Videos 2:47 Rob's forecast: Cool start for Sunday 2:51 Bay Area forecast: Cool start for Sunday 2:33 Cinthia's forecast: May gray morning, afternoon sun 2:53 Jeff's Forecast: Morning fog returns under cooler system and when it warms 3:44 Forecast: Chilly start to Memorial Day Weekend