Tornadoes scare people and can cause lots of serious damage.
A tornado starts in thunder clouds they form in warm moist air. When the wind hurls into each other from different directions the air begins to form into a funnel. Then the funnel touches the ground and sucks dirt and dust causing the funnel darken. Tornadoes can be hundreds of metres high and can speed around at 500km per hour. Tornadoes can last for fifteen minutes to five hours. Scientists do not know how funnels of tornadoes stop. Although tornadoes are dangerous we are learning more about them.