More than 50 million Americans across the Midwest and Mississippi Valley are in the threat zone for a brewing severe weather outbreak expected to develop on Monday, with the potential for large hail,

Communities across the Midwest were starting the cleanup process Saturday after multiple tornadoes touched down and severe weather struck areas from the Great Lakes to Texas.

Add Yahoo as a preferred source to see more of our stories on Google. Millions of people across the Midwest are under winter weather warnings that promise to drop between one to three feet of snow from South Dakota to the Great Lakes overnight into Monday.