1 - Prior to the development of the storm, a change in wind direction and speed with an increase in the height tendency to create a horizontal rotation in the lower atmosphere. This change in direction and wind speed is called wind shear.
2 - Air ascending from the lower atmosphere enters the storm and the air rotating inclined from the horizontal position to the vertical position change.
3 - Then there is the formation of a rotation area with a length of 4.6 km, which corresponds to nearly entire length of the storm. Most strong and violent storms are formed in these areas of extensive rotation.
4 - The cloud base and its area of rotation are known as wall cloud. This area is generally no rain.
|Classification||Velocity of winds (km/h)||Base of the tornado (meters)||Track (km)||Damage|