In Chester County, we frequently experience thunderstorms throughout the spring, summer and even the fall. A thunderstorm, also known as an electrical storm, a lightning storm, or thundershower, is a type of storm characterized by the presence of lightning and its acoustic effect on the Earth’s atmosphere known as thunder. Thunderstorms are usually accompanied by strong winds, heavy rain and sometimes snow, sleet, hail, or no precipitation at all.
Most flash flooding is caused by slow-moving thunderstorms in a local area or by heavy rains associated with hurricanes and tropical storms.