Experienced a sizable collapse at the top of the Grrrr couloir. I dug a quick pit and found a PWL (facets) buried under 2.5-3 feet of snow. The facets were gaining strength but still 4-finger hardness under a 1-finger slab. Even though this couloir is primarily SW facing I don't think the upper section sees any sun this time of year bc it's shaded by cliffs so it still has its PWL. The lower portion of the couloir didn't seem to have this issue.