eli5: why are tornadoes common in north America but not other parts of the world?
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Tornados are common in other parts of the world. Though they are usually smaller. Why they are bigger in certain parts of north America is because of the geography of the mid west. You need warm and moist air near the ground which comes from the gulf of mexico and cold dry air which comes from Canda. The bit that is diffrent in most regions of the world is that there are no mountains between the hot and the cold areas. Like europe has the Alps and Asia has the Himalaya. That means cold and warm air have a harder time getting together but it still does happen for example Germany has about 50 tornados every year.
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