GFS coming around as it has a period of heavy snow on Long Island with increased snow amounts:

The 1st image is the future radar from the GFS for 10 PM Monday and you can see heavy snow for Long Island. The 2nd image is the new GFS snow map as it continued to slowly increase snow amounts on Long Island. The 3rd image is the National Weather Service snow map, with a close-up for Long Island in the 4th image.