How can you determine the distance from a thunderstorm?

To determine the distance from a thunderstorm, the most effective method is to count the seconds between seeing lightning and hearing the thunder, then divide that number by five. This technique relies on the fact that light travels much faster than sound, so you will see the flash of lightning before you hear the accompanying thunder.

The speed of sound is approximately one mile in five seconds. Therefore, if you count the number of seconds between the lightning and thunder and then divide by five, you will calculate the distance in miles to the storm. For example, if you count 10 seconds, that indicates the thunderstorm is roughly 2 miles away. This method provides a straightforward and reliable way to assess how close a thunderstorm is, allowing you to gauge your safety and response to the situation.