Here is the present snow forecast from 4 different sources for my area along the coast just south of Boston.
weather.com Tues - 8-12 inches
weather underground -Tues 12+ in
Accuweather 8-16 in
NOAA talks blizzard but gives no accumulation yet. -Tom
wunderground has been running ahead of the other sites in bumping up the forecast amounts. They now have 12-20 for me while accuweather is still on 3-5.