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Image #: 22415661    Lightning from a tornadic thunderstorm passing over Clearwater, Kansas strikes at an open field May 19, 2013. A massive storm front swept north through the central United States on Sunday, hammering the region with fist-sized hail, blinding rain and tornadoes, including a half-mile wide twister that struck near Oklahoma City. News reports said at least one person had died. REUTERS/Gene Blevins  (UNITED STATES - Tags: DISASTER ENVIRONMENT)       REUTERS /GENE BLEVINS /LANDOV
Image #: 22415661    Lightning from a tornadic thunderstorm passing over Clearwater, Kansas strikes at an open field May 19, 2013. A massive storm front swept north through the central United States on Sunday, hammering the region with fist-sized hail, blinding rain and tornadoes, including a half-mile wide twister that struck near Oklahoma City. News reports said at least one person had died. REUTERS/Gene Blevins  (UNITED STATES - Tags: DISASTER ENVIRONMENT)       REUTERS /GENE BLEVINS /LANDOV

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    ¿Cómo se forma un tornado?

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¿Cómo se forma un tornado?

La zona de las planicies centrales de EE.UU. fue afectada por 30 tornados durante el fin de semana.

¿Cómo se forma un tornado?

La zona de las planicies centrales de EE.UU. fue afectada por 30 tornados durante el fin de semana.