I feel like the last winter storm warning was 2016. I know that isnt true but feels like it. They truly are few and far between anymore or at least thats my perception.
The moral is, the farther N you go generally does better with miller b's. There are exceptions of course like anything but thats a pretty good rule of thumb.
I dont go by snow maps 6 days out, use the upper air charts at this range. I deleted my post intentionally as interior and North does ok. SE PA the norm. We take for mid Dec. Lots of time.
Confluence and flat jet ripping. No pna ridge this run. Shred factory....one of those wrenches in a Nina. Hopefully just a fluke run but is a possibility of course.
I noted elsewhere, the higher heights during this time moving wward from NAO to S Central Canada is now connecting with the PNA on the op centered over Rockies. Looping the past 4 runs has been eye opening wrt this feature and is one of the keys in this working.
See my other posts but the +higher heights (some calling it blocking) retrogresses from NAO wward to S Central Canada (eventually feeding the EPO). GFS times this higher height movement West in tandem with a vort moving underneath. Same time these higher heights try and connect with a ridge centered over the Rockies. Unlikely it times perfectly like this, but even more odd it was 2 runs in a row.