Short range models at range....view at your own peril. LOL. The 0z NAM was basically WAA. That probably isn't right, but we'll see. Models have definitely been clear that foothills could have issues with downsloping, rain shadow, and just general "storm ran out of stream" issues. It should come as no surprise these characteristics are seen on each run. There is no reason to be overly frustrated about things you cannot control. It is what it is.
I think we will see winter weather, but it bears repeating....we live in the sub tropics. It wants to rain here, and if it can find a way...it will. That said, let's get a look at the entire model suite before panicking. The good thing is that is January...and it wants to snow sometimes.
The 0z NAM was juiced from the first frame - the very first hour. The southern and northern streams had far more energy. Could it be the system is better sampled now? Sure. But it is a classic model bias of the NAM. That said, a robust trend north on modeling can happen at this range.
Time will tell. Just last night, the system looked entirely out of gas!