Ratios at JFK were also likely much less than 10-1, temps were above freezing, and it was warmer aloft than expected. Even up here in a colder location on LI, the snow intensity wasn’t really anything great until temps warmed up and it had a hard time accumulating when it wasn’t mixed with rain or sleet. If the ground to 800mb was 2 degrees colder, there would be widespread 8-10” amounts here instead of a few inches.