The Electric Factory Above Our Heads Thunderstorms often begin to develop early in the day when the sun heats the air near ...

A Amanda Gumber, research assistant, Space Science and Engineering Center at the University of Wisconsin-Madison: Thunder is formed by the intense heating produced by lightning. The thunder you hear ...

The rumble of thunderstorms across the country this week is a noisy reminder that summer is arriving—and with it, the mix of ...

When lightning occurs, a large discharge of electricity causes the surrounding air to vibrate as it passes through the atmosphere to the surface. Q How does thunder form? — Hazel Foster, Madison, Wis.