Tornado-one of the most dangerous and destructive phenomena of nature
The cases when warm moist air comes into contact with cold, dry arose over cold sites of land or ocean as a result, a funnel is formed.
F0-Storm destroys trees and cause significant damage
F1-Moderate. Rips off the roof of houses, moves cars or takes them off the road
F2-Significant. Rips roofs off houses and knocked out Windows, and destroys mobile home
F3-Strong. Rips roofs off homes,and tilts or turns the trains or cars, pulling out trees.
F4-Destructive. Raises in the air in the light house, making the frames( Каркасы ) durable houses
F5-Catastrophic.Blows strong home destroys the asphalt blowing away heavy machine could knock down a skyscraper