Add Yahoo as a preferred source to see more of our stories on Google. In the U.S. there are roughly 2,300 tornado warnings issued each year. Some years there are more, and some less. However, there ...

Tornadoes are vertical funnels of rapidly spinning air. Their winds may top 250 miles an hour and can clear a pathway a mile wide and 50 miles long. Twisters are born in thunderstorms and are often ...