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.

Meanwhile, the severe weather threat will linger through Sunday from Florida northward into the upper Ohio River Valley, forecasters warned.

A powerful storm system that spawned deadly tornadoes across the Midwest and South, killing at least 36 people, is now heading to the East Coast. The system is expected to unleash severe storms on Sunday,