It’s not anafrontal as depicted by the strongest Euro and Ggem runs, the frontal boundary is a hundred miles offshore. It’s a SW riding the boundary causing converging air to rise and precipitate. I mean Ocean State wx explained this but several posters just skipped over it.
3 hours ago, OceanStWx said:
It's probably too broad a term around here, because you're right there is a difference between cold air trying to undercut the exiting precip and a follow-up wave trying to expand precip back to the NW along a stalled baroclinic zone.
The latter is much more likely to produce something you need to shovel than the former.