This informative book has been newly revised in light of the devastating tornadoes that have swept across the United States over the last few years. 2008 was particularly fierce with clusters of tornadoes forming every month in the first half of the year. Tornadoes cause devastation wherever they touch down. Tornado Alert! is a breathtaking journey into the center of these unpredictable and violent twisters. Some of the features included are: a) how supercell thunderstorms form and how they spawn tornadoes ; b) where tornadoes most often occur, including Tornado Alley in the United States ; and c) how to stay safe during a tornado, no matter where you are.