We're not far north of the mode C veil around EWR and others. ATC brings jets through above cloudbase on weekends since we can be there and currently don't need a transponder. Otherwise, they come through about 5-6K'AGL and we are about 540'MSL.

Yes, we've had days of 10K' bases in southern NY. It pays to not run the wispies in the corridor and to look "up track" every so often.

(Yes, I know this incident happened on a Monday.....).