On Saturday, May 11th, 2013, at 09:55:37h -0400, Di Imeloo wrote:

I heard it pretty clear but could not catch the station ID. It did mention
both an AM and an FM call sign. The format was pop music. They are having a
"Women of Rock" weekend for Mother's Day.

OOPS ...

I should have kept looking through that list before hitting SEND on
that previous message because there is a station on 590 kHz much nearer
Miami, FL than WARM-AM that also carries The Oldies Radio Channel,
namely WAFC-AM 590 in Clewiston, FL "*serving South Florida*"

http://www.trueoldieswafc.com/

So this is undoubtedly the station which you head last night in Miami, FL,
and thus is not a long distance station at all, but just a station on the
edge of night time reception.

http://www.radio-locator.COM/cgi-bin/pat?call=WAFC&service=AM&status=L&hours=N