In article ,
Ron Hardin wrote:

At night, every MW station is a local as far as signal strength goes.
The problem is stronger stations, or many equal stations, when there's
a problem.

The MW frequencies bounce off the ionosphere night and day. They
get absorbed in addition in the day, which makes daytime MW DX more
interesting.

WHAS is usually audible in varying degrees in SE Mich. but past few
evenings has been, as the OP mentioned, blasting in like a local. Maybe
the shift from summer to autumn propagation.
--
Chuck Reti
WV8A
Detroit MI