National Weather Service meteorologist John Moore said a possible twister touched down in the Vicksburg, Mississippi, area.
"The storm is so vigorous that tornadoes are still possible after dark", Myers said. "Additional surveys will likely be needed on Monday in this area".
Robertson County Texas Sheriff Gerald Yezak (YEZ'-ik) told The Associated Press that a suspected tornado hit Franklin on Saturday, overturning mobile homes and damaging other residences. No injuries have been reported, but officials said several businesses and vehicles were damaged. Violent weather is unlikely to be as widespread as Saturday, but some of Sunday's storms may be intense. "Greatest risk near Ohio River Valley and S. Appalachia", CNN Meteorologist Derek Van Dam.
About two hours north of Franklin, dime-sized hail pelted the Dallas-Fort Worth area.
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A third child, Sebastian Omar Martinez, 13, drowned late on Saturday when he fell into a drainage ditch fill with flash floodwaters near Monroe, Louisiana, said Deputy Glenn Springfield of the Ouachita Parish Sheriff's Office. "Take cover now", the NWS office said. Severe storms crossing a big swath of the South, including parts of Louisiana and MS, have knocked out power to thousands and caused some flash flooding.
The death was in Monroe County, Mississippi Emergency Management Agency Director Greg Michel said.
"It looks like a storm came up through Louisiana and into MS and exploded in Monroe County", Monroe County Sheriff Cecil Cantrell said.
The biggest threat with the storms will be damaging winds with the possibility of a tornado. Dozens of homes in Hamilton, Mississippi, have been completely leveled. "We are just a mess".
Georgia's Augusta National Golf Club is included in the slight risk area Sunday as the Masters golf tournament concludes.