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HOW MANY LIGHTNING HITS BECOME
CLOSE CALLS FOR YOU EACH YEAR?

Lightning Detection: Map of Lightning Strikes in the United States

Lightning data provided by
the U.S. National Lightning Detection Network

100,000 thunderstorms annually produce
over 20 million strokes of unpredictable lightning.

Let the truth be known. Depending upon where you live in the U.S., sheer luck plays a greater role than you know in the life or death game of avoiding lightning strikes. Given the number of strokes that occur within 1500 feet of you in a normal storm season, most people rely on a false sense of security. This color-coded map shows five years (1996-2000) of accumulated cloud-to-ground lightning strikes recorded across the United States by the U.S. National Lightning Detection Network. The color-codes indicate the average number of ground strikes per square mile in a given region. In an average year, the United States experiences 100,000 thunderstorms which produce over 20 million strokes of lightning.

For regions marked in Green...this means an average of 2-5 lightning strokes will hit within one mile of your home or business each year.

For regions marked in Yellow...this means an average of 5-10 lightning strokes will hit within one mile of your home or business each year.

For regions marked in Orange...this means an average of 10-20 lightning strokes will hit within one mile of your home or business each year. This link will show you what that means in terms of lightning strikes near your home or office.

For regions marked in Red...this means an average of 15-30 lightning strokes will hit within one mile of your home or business each year.


	COMMON SENSE MISTAKES ABOUT LIGHTNING DETECTION CAN BE DEADLY
	Waiting to see or hear the first stroke of lightning means that you've been at risk of a direct lightning strike for 30 minutes or more already. Waiting for 15-30 minutes after you think a storm has passed doesn't guarantee that the danger of lightning has passed. Storms can stall nearby, or new storms can move close enough to be a danger. The "counting method" of calculating the distance to a storm is almost always useless in determining exactly where and how many storm cells may be a direct lightning threat to you at a given moment.

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