Lightning Distance Calculator

For each calculator: Type a number in the first space, then click the 'Calculate' button. The answer will appear in the second space.
If you heard thunder seconds after the flash, then the lightning was miles away.

If the lightning was miles away, then you'll hear thunder after seconds.

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Featured Weather Library Article:

Lightning types
Anvil crawlers, bolts from the blue, sheet, ribbon and bead lightning. Learn how to identify each!
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