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First answer: A tornado moves in a circular pattern; as a result, the wind speed depends upon the distance from the center.
Second answer:
Because of the differences on the wind speed the center of the hurricane or tornado becomes surrounded by fast moving masses of air and debris, like a wall.These winds are spinning so fast that they cannot reach the center.
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Are tornadoes calm?
No, tornadoes are not calm. They are violent, rotating columns of air that can cause significant destruction and are characterized by strong winds and intense atmospheric instability.
Does a tornado have a calm spot?
Yes. Many tornadoes have a calm center similar to the eye of a hurricane.
How do scientists predict and study tornadoes?
In the long term tornadoes are predicted by looking at factors such as temperature and wind speed and direction at different levels of the atmosphere and by monitoring any storm systems that might come through the area. In the short term tornadoes are predicted by scanning thunderstorms with doppler radar and looking for signs of strong rotation.Scientists study tornadoes primarily with doppler radar as well, which can pick up information on the winds inside the funnel it you can get close enough. A few have deployed probes inside of tornadoes to take measurements.
Do tornadoes have real eyes?
No, tornadoes do not have real eyes. The center of a tornado is called the "eye," but it is a calm area of low pressure where the air is sinking rather than rising like in the rest of the tornado. It is a term borrowed from hurricanes which do have a clear circular center called the eye.
Does a tornado form on the ground first?
No. General scientific consensus is that most tornadoes start forming up inside a thunderstorm and extend downward. There is evidence that some tornadoes form from the ground up, however.
