Euro ensembles snow map, the very early call from the National Weather Service, and the NAM map:

Maximum snowfall amounts will likely be higher than shown in the 1st and 2nd images. The 1st image shows the projected snowfall from the 18Z Euro ensemble mean through 7 AM Monday, and the 2nd image shows the real early call from the National Weather Service, but it only goes through 7 PM Sunday, so that's why I cut it off for areas to the north and northeast of Long Island. The 3rd image shows the projected snowfall through 1 AM Monday from the NAM.