April 2009
Weekly Reader - Edition 2;Apr2009, Vol. 78, Special section p1
The article presents information about tornadoes in the U.S. Also known as a twister, a tornado is a fast swirling wind that lasts up to 15 minutes. Majority of tornadoes are created when there are thunderstorms, when hot and cold air meet. Tornado predictions are provided by the U.S. National Weather Service.


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