weather September 16, 2022 4:57 pm What Is La Niña? NBC Bay Area’s Vianey Arana talks about La Niña and tells us the different between that and El Niño US & World Videos 2:32 Cinthia's forecast: Break from the rain 2:39 Cinthia's forecast: Stormy start, clearing and chilly 3:04 Forecast: Weekend rain chances 2:48 Vianey's forecast: Weekend rain chances 3:48 Vianey's forecast: Some weekend rain