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| Lightning and Storms |
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If the time between thunder and lightning flash is 30 seconds or less, seek shelter
immediately. Do not resume outdoor activities until 30 minutes after the last audible
thunder clap. When lightning storms develop overhead (i.e. a lightning strike is in your
immediate location), seek shelter immediately. |
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Lightning's Distance
When You Hear Thunder |
Time Elapsed Since
Thunder Clap
(in seconds) |
Lightning's Distance
from You
(in miles) |
5 |
1 |
10 |
2 |
15 |
3 |
20 |
4 |
25 |
5 |
30 |
6 |
35 |
7 |
40 |
8 |
Example: If you see lightning 10 seconds after
you hear thunder, the storm is 2 miles away. (10 seconds/5 = 2 miles) |
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Main Office - 321 West Agate Avenue, PO Box 170, Granby, Colorado 80446-0170
(970) 887-3378 - FAX (970) 887-3996 Denver Metro area - (303) 377-2525
email us site map |
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