Cleanup work is still taking place around parts of the Great Lakes region socked by lake-effect snowstorms that dropped several feet of snow over the weekend. Forecasters are warning that another storm system could add a few more inches and maybe even more later this week. Many school districts in western Pennsylvania remained closed Tuesday as the storms were finally slowing after several days of lake-effect snow that also fell on parts of western New York, Ohio and Michigan. Snow totals since Thanksgiving in some places are nearing six feet.