San Francisco February 4, 2018 8:51 am Vianey's Forecast: Mostly Sunny Sunday NBC Bay Area’s Vianey Arana previews a Sunday filled with mostly clear skies and mild temperatures. US & World Videos 2:51 Cinthia's forecast: Spring storm, cooler temperatures 2:58 Jeff's Forecast: Saturday rain drops temps and brings major Sierra snow 3:25 Bay Area Forecast: Storm brings rain, colder temps and big Sierra snow 2:31 Forecast: Rainy Saturday ahead 2:12 Kari's forecast: Rainy Saturday ahead