Tornado (in English: Tornado), a fairly heavy weather phenomenon, by rapid rotation and caused erect hollow tubular air formation. As with ancient mythology, sprang from the waves, clouds of wrestle of the East China Sea Dragon alike named, it has many aliases, such as "water dragon", "long tail" and "upside down dragon" and so on. Tornado size a, but shape are generally a big small funnel-shaped, "funnel" connected to the cloud, under the general contact with the ground and is often surrounded by a cloud of dust and debris, etc..