In Southeast Michigan, the snow is expected to develop after 2 a.m. to 4 a.m. with light snow during Saturday. One to 3 inches of snow is expected through Saturday afternoon for most areas. A second round of more intense snow is possible late Saturday evening into Sunday bringing the potential for snow accumulation more than 6 inches.

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.

In southeast Michigan and the Thumb area, the counties under a warning include Huron, Sanilac, St. Clair and Macomb. To the north, the counties under a warning include Alpena, Alcona, Ogemaw, Iosco, Gladwin and Arenac.