May 26, 2020 2:32 pm Weather Classroom: Air Masses and Weather Patterns NBC Bay Area meteorologist Rob Mayeda brings you the latest episode of The Weather Classroom. US & World Videos 3:19 Bay Area forecast: Clearing, warming ahead 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