1. By: Raevyn

2. TABLE OF CONTENTS  Where Tornadoes usually happen  How often tornadoes happen  What structures usually get hit  How tornadoes form  The most extreme conditions that can happen with tornadoes  AND SO MUCH MORE!!!!!!

3. Where Do Tornadoes Typically Happen? Well, in the United States of America, there is a place called Tornado Alley. The states in Tornado Alley include: Iowa, Texas, Kansas, and many more.

4. HOW OFTEN DO TORNADOES HAPPEN? Tornadoes usually happen during March and August, when it is warmer. 1,000 are reported every year in the U.S.A.

5. What features of weather are involved with Tornadoes Ingredients on how to form a tornado:  Hot air  Cold air  Updraft

6. Most Extreme Conditions Violent tornadoes cause heavy cars to get lifted off of the ground, house swept away, and trees come up from the ground away from their roots.

7. Measurement Scale The scale used for rating tornadoes is the Fujita Scale made by Tetsuya Fujita in 1971.

8. Fujita Scale

9. After Effects of Tornadoes After tornadoes, there might have been people dead, houses wrecked, and sad devastated people all over the area of where the tornado was hit.

10. Key Terms Wherever tornadoes strike, these whirling spirals of wind leave a trail of unbelievable destruction

11. Other Facts  Winds probably race around over the outside at over 240 mph (miles per hour)  They roar past in just a few minutes, tossing people, cars, and buildings high into the air, then smashing into the ground.

12. Video of Joplin tornado

13. 2 Scientist who helped with tornado studies These two scientists are Tetsuya Fujita and Gregory S. Forbes.

14. Sources Thank You To:  http://www.oar.noaa.gov/spotlite/archive/im ages/climatology_alley.jpg http://www.oar.noaa.gov/spotlite/archive/im ages/climatology_alley.jpg  noaa.gov Tornadoes noaa.gov Tornadoes  fujita scale website fujita scale website  Gregory S. Forbes biography Gregory S. Forbes biography  Tetsuya Fujita biography Tetsuya Fujita biography  abc news abc news  Eyewitness Weather by Brian Cosgrove