enormous instabilities @ CA 0800 EDT daily?

I was looking over some trend graphs which I remember to look at from time to time and noticed that there recently has been a large level of instability between 7 and 9 a.m. Eastern (D.C.) time, with the worst period occurring at about 0800. The instability graphs that compute.merit.edu puts together shows a very similar trend, at least for the past few days. Is anyone else seeing this? If so, does anyone have any theories? I'd really like to see this fixed. Sean.