A series of severe storms - including tornadoes - touched down in three southern states Tuesday, killing four people, damaging hundreds of homes and businesses, flipping cars, knocking down trees, and downing power lines. While snow fell in some Midwestern states Tuesday - nearly 2 feet in South Dakota’s Black Hills - a strong storm system expected to drop rain along the East Coast and snow from Missouri to Michigan developed in Mississippi, Georgia and Louisiana, among other southern states.