Another powerful storm system is expected to sweep across a wide swath of the United States, bringing heavy rain to Southern California, heavy snow to parts of the West and Midwest and more snow and freezing rain to the Northeast and New England.

We have upgraded next Tuesday to a top alert First Warn Weather Day, as accumulating snow and some of the coldest air this season is expected to move in.

Overnight, 3-6 inches of snow blanketed southeast Michigan making morning commutes to work Thursday treacherous and closing hundreds of schools and districts, including the Detroit Public Schools, the largest one in the state.