No takers? Okay, I'll take a stab at it.
There's a C2 in Tallahassee (37kw@479') doing urban as "96.1 Jamz" or something similar... As for top 40 - could that have been Alice 96.1 (is that still Alice?) from Montgomery? It's only 900 watts @ 821', but stranger things have happened.
Another candidate is a AC-type station in Baton Rouge, KRVE "The River", which I think is 50kw @ 450'.
If it was any of them, those were some good catches--Tallahasse is what... 200+ miles from Mobile?