Watch Tornadoes: How They Form

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Why is the southern Middle West of the United States particularly prone to tornadoes? In spring, the collisions of still-frigid winds from Canada with the warm upwelling breezes from the Gulf of Mexico create thunderstorms. If these collisions accelerate, supercells of even faster rotations occur, creating more upwelling and circulating, with hail and a funnel forming. This process is clearly demonstrated with narration underpinned by computer graphic images and live-action footage.

| 2007 | 15 min
New Dimension Media
New Dimension Media

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