Eventually, it becomes too warm to sustain the "normal" snowfall for the NYC metro area. While the global temperature has increased around 1.2 degrees over the last 100 years or so, our region has seen higher increases in temperature, presumably because of the slowing down of the Gulf stream/Labrador current, maybe as much as 4 to 5 degrees warmer? NYC has always threaded the rain snow line. With warmer temperature, it eventually will not matter what the storm track is...