Winds in this area are known to be confusing due to proximity to glaciated terrain. Sometimes varying wind directions can be experienced at lower elevations, and can be different from the dominant ridgetop NE flow that was present all day (Feb.17) at Sunburst Weather Station. Below is more info after a follow up question about the observed SW wind observation.
" think todays winds we experienced were a bit basin specific...very down slope and sinking. Although looking up valley and to the SW I did see some blo snow off high ridges."