Download or read book What Is a Tornado? written by Robin Johnson and published by Severe Weather Close-Up. This book was released on 2016-03-15 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: What is tornado alley and where in the world is it? Why are tornados called "twisters"? This dynamic title answers these questions and more as readers discover what tornadoes look like, how, when, and where they most often form, how scientists predict and track them, and the safety steps they can take before, during, and after a tornado touches down