General objective of this lecture is to present on Tornados. Here briefly describe some dangerous facts on tornados. Like; Winds can exceed 300 mph; Around 1,000 occur on average each year in the U.S. Kill 80, injure 1,500 people each year on average. Tornadoes are violent storms that strike as a powerful rotating mixture of wind and thunderstorm clouds, extending from the clouds to the ground in a funnel shape. In a sentence, it means, violently rotating column of air (Vortex) extending from a thunderstorm to the ground.