A tornado is strong wind vortex with a high-speed rotatry funnel-shaped cloud cloumn caused by the intense convection of the air under extremely unstable weather conditions. The center speed can reach near 100 ~ 200 m/s with the maximum speed of 300 m/s, which is several times than the maximum wind speed of the typhoon center.
Air rotate rapidly around the dragon roll shaft and under the attraction of extremely reduced tornado center pressure, in a thin layer of air that is nearly in tens of meters on the ground, the air is inhaled from all directions the bottom of the vortex, and then turns into a vortex axis upwards. Tornadoes have a great sucking effect, which can suck the seawater off the sea, forming a water column and then connecting with the cloud, commonly known as "a dragon draws water".
There is a piece of black or thick cumulonimbus clouds upper tornado with funnel-shaped cloud column that seems like elephant nose in lower parts. Because the internal air is very thin, so the temperature decreases sharply, prompting the water vapor rapidly clot knot, which is also the important reason for funnel-shaped cloud.
Tornadoes often occur during summer thunderstorms, especially in the afternoon and evening. The scope of the attack is small, and the diameter of a tornado is usually between ten meters and hundreds of meters.
Tornadoes usually have only a few minutes to live, and the longest is no more than a few hours. The wind is particularly strong with extremely destructive power. If the tornado wind passes through the place, the trees are always uprooted, vehicles were overturned, and buildings are destroyed and so on. More seriously, people can be sucked away.
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