While an el nino makes miller a coastal storms that drop copious amounts of qpf over us more likely due to a more active STJ, it is no guarantee we get a MECS+. It could just be rain, like 97-98. We could get nothing, like 72-73. Or we might just get a couple of NS systems and the rest is torch, like 23-24.
It does increase our chances, but we need cold air, blocking, and polar jet and all the ingredients. Active STJ is only one of many ingredients.