KENNER, La. — A deadly storm system that spawned tornadoes in Gulf Coast states Tuesday and killed at least three people in Louisiana and Mississippi was expected to bring severe weather to the Carolinas by Wednesday afternoon.

Meteorologists at the national Storm Prediction Center warned of the potential for more tornadoes — including some possibly strong twisters — along parts of the Atlantic coast, including the Carolinas and Virginia.

In a Wednesday morning briefing, forecaster Jaret Rogers said large hail and a few tornadoes were expected to develop over the region later Wednesday and Wednesday night. Rogers said some of the larger metro areas at risk of severe weather included the North Carolina cities of Raleigh and Wake Forest.

Tuesday’s storms mangled trailers at an RV park, ripped roofs from buildings and killed at least three people in Louisiana and Mississippi, authorities said.

One of the hardest-hit areas in the Gulf Coast appeared to be a recreational vehicle park in the town of Convent, in southern Louisiana. Two people were killed there, said St. James Parish Sheriff Willy Martin, speaking on local television. Authorities were working into the early morning to look for people possibly trapped under the debris, Martin said.

Thirty-one people were taken to area hospitals and seven of them were in critical condition, he said.

“We never had anything like this; we never had this many people injured in one event, and so much destruction in one event,” Martin told WVUE-TV. “We won’t stop searching until we’re satisfied we’ve searched every pile.”

Wednesday morning, Martin said an all-night search of the RV park found no additional injuries or fatalities. Three people were still missing and Martin said he hoped to locate them Wednesday.

Jerome Picou, who lives near the park, said just before the tornado hit that it was raining and the skies grew dark. Then he heard what sounded like a freight train.

“The wind was blowing a little bit, but then it stopped. Then all of a sudden all kinds of wind and rain started. It was so bad, I had to go inside the house or I would have been blown away with it,” Picou said.

In Alabama and Georgia, forecasters issued flash flood watches ahead of the storm system, which was expected to drop 1 to 2 inches of rain. The warnings were expected to be in effect through Wednesday afternoon.