December 18, 2017 11:55 pm Jeff's Forecast: Bay Area Rain & Sierra Snow A system moving through this week will bring the chance of Bay Area rain and dangerous travel to the Sierra. Chief Meteorologist Jeff Ranieri has the updated storm timeline in your Microclimate Forecast. US & World Videos 2:59 Rob's forecast: Warmer days ahead 3:34 Bay Area Forecast: Warmer days ahead 2:42 Cinthia's forecast: Sunny and breezy 2:58 Rob's Forecast: Breezy Sunday 2:55 Bay Area forecast: Breezy weekend