Hundreds of thousands of people were under severe weather alerts, including tornado warnings, from Texas to MS over the weekend, and the storm made its way north Sunday, threatening states in the mid-Atlantic and northeast regions of the U.S.
The Times Gazette reported several homes and businesses were damaged after an apparent tornado struck Shelby, Ohio, Sunday about 4 p.m.
Two people were hospitalized for injuries not thought to be life-threatening, while others were treated at the scene for minor injuries, Yezak said.
Meteorologist Doug Frank in the Weather Service's Cleveland office said Monday that a tornado touched down Sunday evening in Shelby.
With no reports of major structural damage and no confirmed sightings of funnel clouds, the weather service is not planning to send a storm team out to investigate, at least as of late Monday morning.
But tornadoes aren't the only possible cause of destruction Sunday.
Warm air enhanced the atmosphere's instability Saturday, allowing the storm system to rev up more energy and grow, CNN meteorologist Chad Myers said.More news: Tiger Woods cops accidental slide tackle after miracle shot at US Masters
"Damaging winds and some hail are also associated with these storms pushing through the Southeast this morning", Brink said.
In East Texas, the Angelina County Sheriff's Office said an 8-year-old and a 3-year-old died when strong winds toppled a tree onto the back of their family's auto in Lufkin while it was in motion.
Heavy rain from the thunderstorms may lead to isolated instances of flooding and a "short-lived tornado" is also possible.
One person was reported dead in Monroe County, Mississippi as a tornado ripped through Hamilton, about 45 miles northeast of the campus of Mississippi State University.
The same system caused damage in Columbus, Mississippi.
The fatal incident occurred in Angelina County.