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Environment
Environment Main Global Warming Natural Disasters Habitats FRESHWATER

Clouds Foretell Possible Tornado

Photo: Lightning and dark clouds over a prairie foretell a possible tornado

Masses of dark clouds and a crack of lightning over a prairie in the Midwest set the stage for tornadoes. Tornadoes frequently occur in conjunction with spring and summer thunderstorms, but they can spin off abruptly, at any time of year, in any condition.

Photograph by Carsten Peter