What Is Heat Lightning?
Lightning from a storm too far away for you to hear its thunder, often seen on summer nights. It is regular lightning, not caused by heat. In technical terms: A popular term for the illumination of distant clouds by lightning from thunderstorms beyond audible range, typically over about 15-25 km; the flashes are ordinary lightning.
Heat Lightning In Plain English
Lightning from a storm too far away for you to hear its thunder, often seen on summer nights. It is regular lightning, not caused by heat.
The Technical Definition
A popular term for the illumination of distant clouds by lightning from thunderstorms beyond audible range, typically over about 15-25 km; the flashes are ordinary lightning.
