Q: Can you really count the seconds between lightning and thunder to figure how far away a storm is?
A: Chances are you're not going to have a calculator handy during a storm. However you can approximate the storm's distance in miles by counting the seconds between the lightning and thunder and dividing by five. It takes about five seconds for the sonic boom to travel one mile, so if you see the sky illuminated by a streak of lightning and count 10 seconds until you hear the low rumble of the thunder, the storm is about two miles away.
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