Millions of Americans across the country are on alert for a severe weather outbreak as violent, long-track tornadoes with damaging winds of up to 80 mph and large hail are expected across the Midwest and South with the cross-country storm moving east.

Large and destructive tornadoes are carving paths of destruction across the South for the second day in a row.

Tornadoes in the South and Midwest overnight and early Saturday left 11 dead in Missouri. More tornadoes are forecast Saturday and Sunday.

The weather cut a swathe of destruction across an area of the country that is home to more than 100 million people.