Hey Ray! Explaining What Heat Lightning Is

PITTSBURGH (KDKA) — When people refer to heat lightning, they are usually talking about seeing lightning, but not hearing thunder in the evening or nighttime, usually during the summer months.
Heat lightning isn’t a specific type of lightning, though.
(Photo Credit: KDKA Weather Center)
The simple explanation is that “heat lightning” is just a thunderstorm that is too far away to be heard.
If you remember from a previous segment, light travels faster than sound.
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