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How do tornadoes form in Tornado Alley?

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This map shows where most tornadoes form in the United States. The red area is known as "Tornado Alley". Most of the tornadoes in the southern U.S. near the Gulf of Mexico are formed by hurricanes. Click on image for full size. Related links: Where else in the world do tornadoes frequently occur? read more

During Tornado season, warm dry air from Mexico, moist air from Atlantic ocean, cold air from Canada and dry air from Rocky mountains converge over Tornado alley. This makes an ideal environment for violent thunderstorms which grow into super thunder cells forming tornadoes. read more

Tornado Alley is a nickname given to an area in the southern plains of the central United States that consistently experiences a high frequency of tornadoes each year. Tornadoes in this region typically happen in late spring and occasionally the early fall. read more

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