The thunderstorm that sparked tornado warnings for the Charleston area late Wednesday afternoon knocked out power for about 3,900 people in West Ashley, James Island and North Charleston, according to S.C. Electric & Gas.

The outages were mainly caused by tree limbs falling on lines, according to a utility spokeswoman.

Hailstones the size of golf balls were reported in Shadowmoss. Trees fell across Bees Ferry Road and Riverland Drive. West Ashley was under a tornado warning from the National Weather Service until 6:45 p.m.

A tornado watch for Charleston expired at 6 p.m with no touchdowns reported.