Saturday, March 9, 2019
Friday, March 8, 2019
Above Treeline - NE face Pre-Laurel Pk.
Location Name or Route
Pre- Laurel Peak
Persistent Weak Layer
This massive avalanche occurred sometime between Thursday (3/7) afternoon and Friday (3/8) night. It occurred after snow containing about 3 inches of water fell in the previous week. Strong W and SW winds loaded this slope which meant snow containing about 6 inches of water had been added to this slope prior to this slide.
On average it maybe had a 6 ft thick slab. The crown face was 10+ feet deep in many places.
We were working in the area on Friday and observed very strong winds drifting snow at the trailhead. We discovered this avalanche on Saturday morning.