weather forecast March 20, 2021 10:46 am Vianey's Forecast: Spring Has Sprung Hello spring! The weekend will see cool to mild conditions to start on Saturday, and trend a bit warmer Sunday. NBC Bay Area meteorologist Vianey Arana has your microclimate forecast. US & World Videos 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 2:48 Jeff's Forecast: Dry Friday; rain returns this weekend