12z Euro is going to be wayyy north with the main storm.
Significant changes aloft in terms of trough organization/quality, ejection timing and ridging ahead of it.
12z GEM is a bit south with the overrunning event and is well south/weaker with the main storm (Ejecting trough is much more positive tilt/strung out/further south).
12z GFS coming in with a slightly different orientation for the overrunning event...It's a bit south for eastern areas and a bit north for western areas.
Differences in the 12z NAM start off at noise level early in the run, but increased quickly by mid-run.
Main storm is definitely jumping north on this run.
A lot of guidance that is south of the GFS are still showing significant snowfall totals. I’m not saying it’ll be the case with this one, but there are many cases that would prove the first part of your comment wrong. .
Some of the positives we saw, such as with the 12z run, stepped back.
PV in Canada was further SW, along with associated area of confluence. Heights also steadily lower ahead of the main ejecting wave.