With all the snow on the ground in this part of the country right now, I know I'm getting much better groundwave reception from many stations. That might have happened to you, but at 5 a.m. I doubt it. Goodness, it's still dark until 7:30 a.m. here in central Ohio so no way the sun is up for you yet.
I will have to try to CKLW here. They do throw a nice daytime lobe in the direction of Evansville but null toward me here in Columbus, I believe because of the Huntington, W.Va. station on 800.