Really needed/need the 50 50 further SW. Thats really it...without that there is no confluence over New England to prevent this from riding inland or the coast. There is too much high height potential in between our threat and the 50 50.
No mechanism to drive down cold air, and not much available with a somewhat ugly PAC. That ridge rolls over and you are only able to get a shallow cold air mass, can't establish an arctic fetch with that.
Could this change? Yes and it will, but I believe it's becoming more evident that this is an interior threat. But there will be a storm.