I know what you mean by NW bias, but I think it does well overall with the warm intrusions. For instance I don’t notice a NW bias when it shows this….maybe if anything is actually depicts the surface low as it should….following the path of least resistance near coast vs going inland.
However, I’ve noticed that given similar low placements on guidance, it seems to handle warm air intrusions aloft better….800mb and above stuff.
I think this is working out close to HRRR and other guidance that had snow start near CT coast from a good burst. However sleet like racing north so I’m not sure we see a big + bust? Unless you bought the nam haha.