I talked with Josh P (frontier anglers guide) about this hatch a couple of weeks ago after my trip in the canoe. He had been on the river that week also and he thought they were isonychia. This was on the French Broad. 1000's of maybe a size 16 shucks on the surface and the shad were wearing them out. They were very light yellow shucks, and I thought they were a sulphers also. .
If you were on the FB, did you notice all the gar spawning in the shallows?
Jim, (waterwolf) have you been on the FB lately and witnessed this hatch?