Edgefield County Sheriff's Office dispatch said a tornado touched down near a subdivision at Deer Springs Road near Martintown Road about 10:30 p.m. Sunday, causing moderate damage but no injuries.
Counties in the Augusta-Aiken area were under a tornado watch until 5 a.m. today, the National Weather Service said.
Included are Richmond, Columbia, Burke, McDuffie, Glascock, Jefferson and Warren and Washington counties in Georgia and Aiken, Edgefield, McCormick and Barnwell counties in South Carolina.
Columbia County emergency officials called the Sunday activity unusual, even for spring.
"There were two tornado watches, two tornado warnings, three severe thunderstorm warnings, and a special weather statement...starting at 3:45pm yesterday," Emergency Director Pam Tucker said in a news release. "I don't remember ever having that many watches and warnings in one day. Fortunately, we didn't receive any reports of weather related problems save for a few short-term power outages reported during the first round of storms that passed through our county."
The weather outlook improves today. Clouds will mostly persist in the north through noon before beginning to clear out and sunny skies will continue south with afternoon highs reaching near 60 north and near 70 south. The skies will be clear by tonight with overnight lows dropping into the lower 40s.
National Weather Service meteorologist Mike Proud said technicians would be visiting several areas today to inspect for damage, including another spot in Edgefield County near Sweetwater Road.
Elsewhere in South Carolina a line of thunderstorms dropped trees and power lines as it moved across South Carolina, but there were no reports of serious injuries.
Utilities that serve South Carolina were working this morning to restore service to about 700 customers. The largest outages were in Charleston, Florence and Spartanburg counties.
Winds associated with the storms blew over trees and damaged five homes near Batesburg-Leesville, about 30 miles west of Columbia. Transportation Department employees cleared some trees that fell on U.S. Highway 378.
There were reports of hail in Spartanburg and Cherokee counties.
Associated Press accounts contributed to this report.