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Originally Posted by kato13
The average wind direction for Detroit for November from 1930-1996 was WSW at 11 knots according to the pdf attached. It surprised me as well. I even thought that it might be the direction the wind came from (as winds are often reported) but the pdf does seem to support it is the direction.
I may throw in some Canadian weather station reports, for greater accuracy, if I can dig them up.
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A thing to remember about these reported winds is they are "surface" winds. While they affect the fallout, the higher altitude winds above about 20K feet will be a real determining factor I think, since lower level particles will fall out more rapidly and be localized while those thrown into the higher winds will travel further. (does this make sense
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