Hello all. I just found this forum today...while I was waiting on my new Explorer ST to be looked at because of this same issue. The 'head mechanic' for the dealership said this is a known issue and the problem is the plastic trim strip running between the roof rails along the side of the roof and extending forward to the top of the front window. See area highlighted in the yellow circle on the attached picture. He said that the front end of the trim nearest the top of the window is not secured down and air gets under this which causes the noise we are hearing. He said they are waiting on Ford to provide the solution to this issue but hopefully will be coming soon. Anyone here hearing anything similar or different?