A winter storm that left a glaze of ice and snow across portions of the South and is being blamed for at least three deaths has turned its attention to New England, where travel conditions have already become treacherous and a chain-reaction accident on a Connecticut road involved nearly two dozen cars. Before the storm churned north along the Atlantic coast, it left icy conditions in Alabama and Mississippi, where a former governor was hospitalized after he slipped and fell on his icy driveway.