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 moveing east.

A monster storm system carrying a high risk tornado threat is barreling through the Southeast after unleashing deadly tornadoes, fierce winds and devastating damage across the Plains and Midwest.

Severe weather outbreak kills at least a dozen people as storms, tornadoes moved across the Midwest and South.