I think it is predominately Nina climo, modified somewhat by other factors, and just some bad luck up your way. -EPO patterns can tend towards dry/cold and later development of lows that do track to our south. Even here I have been on the edge of some of the recent storms(da bomb cyclone) that have nailed the immediate coast, but have done really well with others. Two 8-10" storms this winter and the early Jan(CAPE!) storm in 2022, plus multiple other 5-7" storms since the 2016 Jan storm(which was disappointing here). The Neutral/Nino winters in that time frame have produced below avg snow here. In short, a Nina with a significant period featuring an EPO ridge has worked out well for southern/eastern parts of our subforum, even with marginal help in the AO/NAO space.