"What is tornado alley and where in the world is it? Why are tornadoes 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"--Provided by publisher.

Changing weather -- Thunderstorms -- High-speed storms -- Tornado alley -- Storm trackers -- Safe places -- Go inside -- After the storm -- Tornado test -- Answers.