Wind transport on Needle Peak

We observed strong winds and wind transport on Needle peak this morning. The wind died down in the afternoon.  Along the ridgetop we kicked at several leeward test slopes about 30% of which failed, the largest of which being 2x4 feet and 4 inches deep. Most of these instabilities we saw were near the ridgeline. However, we did see some comparable sized cracking on a NE slope at @8,600 feet below tree line and about 100 feet below the ridge. We saw one large old crown above Needle Lake and evidence of a large cornice collapse, today or yesterday, in Nat Geo Bowl. We gave cornices a wide berth today.  On the exit around 2:30, some rollerballs were forming on southerly aspects.