السبت، 17 ديسمبر 2011

A "cold air funnel" is different from a tornado


It is technically a tornado if/when it touches the ground, but it forms differently and has milder implications. You'll want to use the slider to skip through this video from Minnesota, which could have been edited, but at least the longer runtime shows how slowly cold air funnels evolve.  There are many similar videos on YouTube and a brief explanation at Wikipedia.

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