Earth is a very busy place. He is never calm. Nature puts us to the test every day with thunderstorms, snowstorms, hailstorms and many other types. But even if we were tired of these storms, we couldn't survive without them. However, at times, these storms can get a little too severe and dangerous results can occur on land or water. One of these consequences is tornadoes. Tornadoes are strong, fast, swirling winds that can go at top speed for hours on end. They extend from specific clouds to the ground and move long distances to create chaos and ruin. Tornadoes are usually formed from a cloud called a supercell. Supercells are cumulonimbus clouds, but the only difference is that they have a rotating cloud wall, the large extension from the base of a cumulonimbus cloud. This rotation is caused by a mesocyclone. Scientists don't know exactly how a tornado forms; they only have a general idea of ​​the training. They believe that a tornado forms from the mesocyclone, which is a rotating updraft, in the wall cloud. Mesocyclones form when winds at different altitudes come together and roll and fall, creating a “cylindrical” shape. If a supercell thundercloud arrives, its updrafts will lift the mesocyclone, causing it to rotate upward. The updrafts merge with the mesocyclone and begin to rotate as well. If the mesocyclone tightens and stretches, it will rotate faster and rapid winds may form within the mesocyclone. Precipitation from the supercell will push the tail of the winds down and when it hits the ground it is called a tornado. However, not all mesocyclones can form tornadoes. Tornadoes have very strong winds and can cause minor to severe damage to many cities. Tor...... half of the paper ......founded. Category F3: Severe tornado (254-331 km/h) serious damage. The roofs and some walls are torn away. Trains are overturned. Most of the trees are uprooted. Heavy cars are launched. Category F4: Devastating Tornado (333-418 km/h) Devastating damage. Well-built homes are razed. Houses with weak structures are swept away. Cars are launched. Category F5: Incredible Tornado (420-511 km/h) incredible damage. Strong houses are lifted and thrown. Trees are torn from the ground.""Improved Fujita scale:EF0: 104-136 km/hEF1: 138-177 km/hEF2: 178-217 km/hEF3: 218-265 km/hEF4: 267-321 km/hEF5: 321 km/h and above” Usually, when you know a tornado is coming, the rotating cloud wall will be one of your first signs, but you can never be sure when a tornado is coming. In fact, tornadoes occur almost instantaneously, and people have very limited time to get to shelter.