Understanding the 30 30 Rule for Thunderstorm Safety

Learn what the 30 30 rule is and how to stay safe during thunderstorms with this essential guide.

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The 30 30 rule is used to estimate the proximity of a thunderstorm. When you see a lightning flash, start counting until you hear the thunder. If it’s 30 seconds or less, the storm is within 6 miles (10 km), and you should seek shelter immediately. After the last thunder, wait for 30 minutes to ensure the storm has passed before resuming outdoor activities.

FAQs & Answers

  1. What is the purpose of the 30 30 rule? The 30 30 rule is used to estimate the distance of a thunderstorm and indicate when it is safe to be outdoors.
  2. How do you count with the 30 30 rule? After seeing a lightning flash, start counting. If you hear thunder within 30 seconds, the storm is close, and you should seek shelter.
  3. What should you do after a thunderstorm passes? Wait at least 30 minutes after the last thunder before resuming outdoor activities to ensure the storm has completely passed.