* WHAT...Heavy snow expected. Total snow accumulations between 5 and 7 inches. * WHERE...Portions of northern Indiana and northwest Ohio. * WHEN...From 7 PM Saturday to 7 PM EST Sunday. * IMPACTS...Travel could be very difficult, especially Sunday afternoon and early evening. * ADDITIONAL DETAILS...Light snow will develop by Saturday evening, increasing in coverage and intensity during the day Sunday. The period of greatest impacts and snow accumulations will exist Sunday afternoon into early Sunday evening roughly along and south of a Marion, Indiana to Ottawa, Ohio line. While some drifting snow is possible, winds will not be as strong as recent system.