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 Tornado Watch has been issued until 10 a.m. for Auglaize, Butler, Darke, Mercer, Miami, Montgomery, Preble, Shelby, and Warren counties in Ohio. This also includes Union and Wayne counties in Indiana. A Wind Advisory is in effect for most of the region until 8 p.m. tonight.