I grew up in Morris County, NJ, and in the 60's, 70's, and even very early 80's, it was not unusual for anyone there to pick up WARM loud and clear. In fact I even logged WARD 1540 loud at my home there (just before I moved to NEPA and it became 1550). I can not remember that particular year but I want to say it was 1976.
I recall a major flood after a snowstorm that happened in the early 90's. I believe Harry West was still doing the morning show. I was stuck, literally in NJ at my parents house and aside from calls to my wife (stuck at home in NEPA, Wayne County), my only real connection to what was happening in my "new" home was WARM. I could hear it loud and clear over my car radio.
Because of the coverage WARM did, I decided, and quite rightly, to stay in Northern NJ until things cleared up a bit for my travel home.
The coverage was tight: I encountered everything reported.
I have heard 910 and 980 in Northern NNJ as well in the past. But we have two issues here: 1. In the case of WARM, a degraded broadcast system everyone on here knows about, and 2, the total degrading of the AM band alltogher, from outside noice to the fact it is overloaded with stations.
But that fact brings along another: that if AM radio is to survive, it will truly be a LOCAL service again........all of the facts, like HD being the same. And that, may be a very good thing.
It might be interesting to add that WARD, at 1540, and I believe at 1,000 watts ND, did a pretty good job coming in where just up the road, we had 10,000 watt WRAN blasting (albeit at 500 d watts at sunset), and that is the first place I played radio, so I know that install well.
Tropo on FM is getting silly: I've recently heard NC and SC FM stations here in NEPA........the further south the better it seems and the stations from Binghamton have taken a real beating in NEPA from that tropo.
Carl