From Doug Chabot:
Today I turned around on the approach to an ice climb on the north face of the Sphinx. Cracking in the windblown snow was a sign of things to come. At the first wind-loaded gully I crawled on my hands and knees over to the slope and whacked it with my ice axe. It avalanched. Although it was only 4" thick, it propagated 75 feet above and scraped the snow over a cliff. We opted to not tempt any more slopes and went home.