| Canada | |
| Environment Canada | http://weather.ec.gc.ca/canada_e.html |
| United States of America | |
| National Weather Service (NOAA) | http://www.nws.noaa.gov/ |
| Storm Safety/Severe Weather | |
| Storm Safety, Understanding Storms(NOAA-USA) | http://www.nws.noaa.gov/om/brochures/ttl.pdf |
Updated
November 28, 2006
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