The latest forecasts show stormy weather will ramp up up across interior Northern California by midweek, hitting hardest Tuesday night into Wednesday morning. It’s the second system of the week, according to National Weather Service, after the first dropped showers in the Sacramento Valley and light snow in the Sierra range Monday and early Tuesday. Heavy snow is expected to have a major impact in the mountains Wednesday, and NWS is strongly discouraging mountain travel through Thursday. NWS and Caltrans have said on Twitter that chain controls appear all but certain and highway closures are possible at higher elevations.