[Eric in the Ozarks]

I'm in Camden County at the Lake of the Ozarks and can not get KWTO 560-AM in the house but it comes in on my car radio. I do get KRMS 1150 AM from Osage Beach and they carry Rush at 11 am.
Something else may have an affect on AM radios this time of year besides the hilly terrain: Local sunrise and sunset FCC rules mandate changes in pattern and signal strength for many AM stations and as the sun comes up later in the morning, you may be trying to pick up a station that is on an overnight restricted frequency.

[CDHart]

Could be, as AM definitely comes in better after the sun comes up.

Carolyn