Yesterday's thaw/ freeze and winds overnight roughed up the upper snpk quite a bit on the S1/2. surfaces ranging from dense/ damp powder, sun crusted expanses, and areas of dense wind skins/ slab lee to the W made for grumpy skiing conditions. Was able to chip out a few supper table size pencil wind drifts with ski cuts. Mid/ basal snpk layering not as drastic/ loose or melt water affected as I've noticed in adjacent areas in S facing LCC. Obvious 17 March SW wind deposited dust layer in profile along with interesting residue and frag (shrapnel) remnant from previous artillery firing missions above the town of Alta- thinking it was from the March 1st shoot.