Public Observation: https://nwac.us/public-obs/12391/
"Prior to the avalanche, we were shearing off thin (1-2 inch) and small (no more than 1 foot wide) wind slabs as we booted up, which lead us to turn around. We saw no shooting cracks and experienced no whumphing until triggering the slide."
Information from Public Ob used. Unkown total length, but victim was carried ~20ft.
From observation: As I started skinning across the pictured slope at a traverse, I heard a whooshing sound, and a wind slab propagated about 20 feet in front of me and 25 feet above me. I was carried about 20 feet downhill and had three of my limbs completely buried. One arm and my head were unburied.