The term ChazInMT might've used is 'stagnation point'. Air above the stagnation point goes up, below it goes down, and either side to it's respective side. Air at the stagnation point is pushed down the road for feet at a time.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Three conspiracy theorists walk into a bar --You can't say that is a coincidence.
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