| The old timers used to say that it was a sign of dry weather. In Iowa it is not uncomon at all in the summer months. A buddy and I once saw a paper feed sack continue upwards till it was out of sight. We were supposed to be unloading hay together, but we took turns watching in shifs when the other persons eyes were getting tired. It took over a half hr to fourty five munites to disapear. Once in a while we would see a chunk of hay from a windrow go upward in a cirle type motion, but usualy they returned to the ground after a couple munites. Now days the windrows are much bigger from wider mowers so that probably haulted the heavenly hay. I haven't seen one for twenty years now, but I don't spend alot of farm time now either.
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