Well, the first two of tonight's 0Z global models just came in with the GFS showing an incredible snowfall gradient from SE to NW, i.e., from an inch or two (at the end of the storm) ~15-20 miles SE of me to about 8-10" at my house in Metuchen to over a foot 5 miles north of me. Insane. Same thing for NYC with maybe 5-6" at JFK on the ocean to over a foot in Yonkers. And the CMC shows a similar very steep gradient, but a bit more rain/less snow for 95 than the GFS, with about 2-5" from Trenton to NYC and nada only 10-15 miles SE of that line and 6"+ 10+ miles NW of that line. Note that the NAM and RGEM also came in, but they're at the end of their range when it's precipitating and both are regional/mesoscale models that are not taken seriously past about 48-60 hours
While I wouldn't expect either of these to verify per se it clearly shows the difficulty of making a forecast for this storm, as we're likely going to see similar gradients in the other models (as we've been seeing previously), as it only takes a small track shift to lead to a 1-2F temperature difference for a particular area, which can change snowfall amounts from 1-2 inches to 8" or more. Will update this post as models come in. Not going to post the maps, as they're going to change with successive runs, plus they're easily available elsewhere, like the link below. Will be interesting to see what the NWS predicts at 4 am. Glad that's not my job, lol.
https://www.americanwx.com/bb/topic/59874-two-moderate-to-high-impact-events-nyc-subforum-weekend-jan-6-7-and-mid-week-jan-9-10-total-water-equiv-by-00z11-general-2-possibly-6-includes-snow-ice-mainly-
interior-river-flooding-potential-increases-jan-10-and-beyond-damaging-wind/page/38/#comment-7115732
The 0Z UK just came out and it's weaker and wetter than the GFS/CMC with only about 1/2-3/4" of total precip (water equivalent or QPF) with maybe only 1-2" of snow along 95 from Trenton to NYC and nada just 10 miles SE of that line, but 4-7" just 20-25 miles NW of that line and especially N of 78. Euro up in about an hour.