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Wind is air in motion. Wind forms when the sun heats one part of the atmosphere differently than another part. This causes expansion of warmer air, making less pressure where it is warm than where it is cooler.
Where does the hot and cold air that form a tornado come from? To start off, the warm air cold air are not the direct cause of tornadoes. When cold air plows into warm air, it forces the warm air up causing the moisture in it to condense â¦and form thunderstorms. Given a few other conditions these storms can produce tornadoes.