The storm line is expected to move east toward the Dallas-Fort Worth Metropolitan Area, according to The National Weather Service.
RELATED: Tornadoes sweep through University of Oklahoma town
The massive clash of cold and warm air stretching from Ohio and Virginia down to Texas could produce a "blockbuster" storm with heavy snow to the north and severe thunderstorms and possibly tornadoes to the south, AccuWeather warned.
In all, some 35 million people live where severe thunderstorms (including tornadoes) are possible Thursday afternoon and evening, the Storm Prediction Center said. A tornado watch has been issued for parts of Texas, Oklahoma and Arkansas, including the entire Dallas metro area.
The storm follows a wave of damaging weather that has swept much of the nation for several days.
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