A thunderstorm is a natural phenomenon that occurs when warm and cold air masses collide. An accompanying effect of lightning is thunder, which is a sound effect caused by the rapid expansion and contraction of air surrounding the lightning bolt. Thunderstorms are often accompanied by heavy rain. The sound of thunder is deep and resonant, often described as rumbling or roaring. Initially, it may start as a sharp crack or snap when the lightning cuts through the air, followed by a long, rolling rumble that gradually fades away. Thunder can sound different depending on the distance from the lightning and geographical conditions, sometimes like a distant rumble, other times like a deafening crash. This sound effect of thunder and rain is now available to you.