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.

Severe weather, including tornadoes, caused at least 34 fatalities across six U.S. states, with Missouri experiencing the highest death toll. More than 150,000 people remain without electricity. Missouri's Butler County faced extensive property damage.

A Tornado WATCH is in effect for North Central Arkansas until 11 p.m. Friday as strong to severe storms capable of producing tornadoes are expected this evening. More watches may be issued for eastern Arkansas later tonight.

Three people are confirmed dead following a tornado outbreak in Alabama. Two people died in Plantersville and one person died in Winterboro. Sign up for our Newsletters. Video abo

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The eastern part of Ohio is under a tornado watch until 4 p.m. on Sunday. A wind advisory was extended until 2 p.m.