I know it's not exact or necessarily correct, but on InstantWeatherMaps it has 46.7" as a max @ 51h in central mass
http://www.instantweathermaps.com/NAM-php/showmap-conussfc.php?run=2015012600&time=PER&var=ASNOWI&hour=051
Man it's so insane to see that much snow being dumped on every run on every model over NE. Never thought I'd see 2 of the biggest storms ever in Boston in just 8 years.