A thunderstorm is a weather event characterized by heavy rain, strong winds, and loud claps of thunder. These storms form when warm, moist air rises and cools, creating clouds filled with water droplets. When the droplets become too heavy, they fall as rain, and the rapid movement of air can create lightning, which is the bright flash we see during a storm. Thunderstorms can vary in intensity, with some producing light rain and others leading to severe weather like hail or tornadoes. It's important to stay safe during a thunderstorm by seeking shelter indoors and avoiding tall objects, as lightning can strike unexpectedly.