San Francisco January 14, 2018 8:53 am Vianey's Forecast: Storm Systems Lining Up NBC Bay Area’s Vianey Arana tracks incoming storms that could bring rain back to the Bay Area this week. US & World Videos 2:06 Kari's forecast: Slight warming 2:56 Forecast: Warm start, cool finish to the week ahead 3:13 Bay Area forecast: Warm start, cool finish to week ahead 2:56 Cinthia's forecast: Sunday sunshine, breezy afternoon 2:34 Forecast: Windy finish to the weekend