Two evenings of light to moderate migration were followed by southerly winds yesterday, effectively shutting down any major migration events over the region for last night. Here’s the radar from 7:30pm (EDST) last night through 5:00am this morning.

Frames are every 1/2 hour. Click on the thumbnail to view the full-sized animation.

The reflectivity images show a significant amount of strobing caused by atmospheric effects on the radar beam which in turn cause it to extend out farther than it should given its elevation angle (0.5 degrees). Regardless, if we look at the velocity images we can see that most movement across the radar is from S->N and most of this is at the speed of the prevailing winds suggesting something either non-biological (pollen, dust, etc.) or some form of aerial plankton (insects, etc.). There is some N->S signal at higher elevations which suggest some bird activity, but it represents a very small proportion of the radar coverage and therefore I wouldn’t expect it to result in any major changes in localized concentrations of birds today.
Good Birding

David