Radar is indicating a very strong movement of migrants all across the eastern U.S. from Florida to Texas and north to a line of storms along a cold front moving into the South Dakota, Minnesota and Wisconsin area. North of the front is very quiet. There should be obvious arrivals in peoples backyards tomorrow morning (except where I live north of the cold front - doesn't it figure!). Here is a screen shot of movement at about 10:45 pm on 4-30-13.
Keep looking up!