I like you to Alex when digging into the soundings. There’s an upslope component to the larger scale synoptic moisture… you can see how the meso-models fluidly wrap QPF from northeast to northwest/west aspects of the larger White Mtn zones. Final 5,000ft to the surface and below, they see winds move back on the dial to go from NE to NW throughout the event. It should add low level lift/condensing of moisture compared to the southern side.