A tornado causes a lot of damage. Tornadoes are formed in thunder clouds. Within the thunder clouds air hurls against each each other, forming a funnel . When the funnel touches the ground the funnel sucks up dirt , dust and every thing else into it's centre this makes the funnel darker. Tornadoes can travel at 500 kilometers per hour.Funnels can be over 100 meters in height. Tornadoes can last up to five minutes to five hours. Scientists do not no why tornadoes stop.
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