A heavy thunderstorm moved through Gainesville on Wednesday afternoon, bringing heavy wind and rain and leaving several hundred homes without power.Hall County Fire Services reported trees and power lines down in the Riverside Drive area.The storm hit during the late afternoon rush hour after the National Weather Service posted a severe thunderstorm warning for the area. The warning expired at 6 p.m.Blueberry Hills Drive was completely blocked by downed trees, as was one lane of Enota Avenue and Enota Drive, Hall County Fire Marshal Scott Cagle said. Trees were also down on Park Hill Drive and Green Street Circle as well as Riverside Drive, he said.Georgia Power reported about 350 customers were without power in the Gainesville area following the storm.