Bird migration was steady all through the night; multi-millions of birds heading north to render this effect on NexRad. By comparing the wind speed and direction against NexRad, you can see the obvious correlation how birds take advantage of a tail wind or no wind at all, until you get to Iowa and southern Minnesota. However, all along the Mississippi River there was virtually no wind and a southerly flow just to the west in the south. Unfortunately, Cindy and Nuthatch, Michigan was once again excluded. But hang in there - the neotropicals are coming!
