Photo by Luke Koerten who wrote, "Saw this right accross the street from my house. Northwest aspect, thick windslab. Steep slope by Pete's hill standards, maybe 35-40 degrees." Notice the grass poking out of the shallow (1 footish deep) snow in the foreground, yet just a few feet away the depth is 2-3 feet deep of hard slab, wind drifted snow. These conditions are similar to what's up Hyalite in the tight gullies that avalanched and killed an ice climber on Friday.
Forecast link: GNFAC Avalanche Forecast for Fri Dec 11, 2009