Quick Answer
Wait at least 30 minutes after the last lightning flash before leaving shelter. This allows the storm to pass and minimizes the risk of being struck. After 30 minutes, assess the weather before venturing out.
Understanding Lightning Safety
When a lightning storm approaches, seek shelter immediately. This can be a building, a hard-topped vehicle, or a designated lightning shelter. Avoid standing near tall objects, such as trees or power lines, and stay away from conductive objects like metal fences or golf clubs.
The 30-Minute Rule
The 30-minute rule is a crucial part of lightning safety. After the last lightning flash, wait for 30 minutes before leaving shelter. This is because lightning can strike the ground up to 10 miles away from the parent thunderstorm. During this time, the storm may pass, and the risk of being struck decreases. If you hear thunder, wait 30 minutes after the last thunder clap before venturing out.
Post-Storm Assessment
When the storm has passed, assess the weather before leaving shelter. Check for signs of a clearing sky, such as increased sunlight or a decrease in wind. Use a weather app or radio to confirm the storm has moved out of the area. If you’re unsure, wait another 30 minutes before venturing out.
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