The snowstorm approaching the East Coast is going to be a doozy:
The place where I feel most confident in amounts is basically that zone under the blizzard watch: Boston and northern Rhode Island. Twelve to 24 inches on every model with 30 inches not out of the question. Eastern Maine, southern New England and far eastern Long Island. Most of Connecticut, central Massachusetts, eastern Maine, and southern New Hampshire are fairly likely to get at least 10-20 inches with two feet not out of the question.
Jeff Masters focuses on the Boston area:
The combination of heavy snow and high winds will make travel extremely dangerous or impossible, with near-zero visibility in white-out conditions. Total snowfall from the storm is likely to rank in the top ten for Boston since weather observations began at Logan Airport in 1936.
Snowfall map from The Weather Channel. More detailed forecast for NYC here.