WGN 720AM, from inside a sheet metal building, booming in.

The talk station that I wanted to listen too last night suddenly went off-air just after 4PM. So, pissed with sports radio, until dark. Then, tuned around on a cheap POS QFX portable that I have there. To my surprise, Chicago's WGN just boomed right in for the last 2hrs of work. And, that's inside a steel building, where my AM RX'ing is very limited. So is my FM. I've heard folks say that AM DX'ing seems to be much better now, and I guess so. However, Cleveland's 1100WTAM has been a hard catch at night, lately. Must be too close at 300 miles away, where as WGN is about 500 miles from me.