Flood Warning Issued For Sonoma County - Rohnert Park-Cotati, CA - "It will take several hours for all the water from these storms to work through local drainage systems in urban areas."
Bay Area weather: Largest storm of the week is about to hit sfchronicle.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from sfchronicle.com Daily Mail and Mail on Sunday newspapers.