A major winter storm will affect much of the central U.S. Sunday and Monday, dumping several inches of snow after laying down a coating of freezing rain and sleet in many areas.  The precipitation will come in waves and not all at once.  The first wave of winter weather will mainly affect northern and central Missouri, where 4 to 8 inches of snow will fall Sunday.  The second wave will have the greatest impact on Southeast Missouri and Stoddard County, likely arriving Sunday evening and overnight, ending midday Monday.  Travel is not advised anywhere in the region beginning Sunday afternoon through Monday afternoon.