Tahoe National Forest Sierra Avalanche Center

Pit dug in below treeline terrain.

Pit dug in near treeline terrain.

Snowpit dug just below ridgeline in open treed and wind loaded terrain.

Surface roller ball activity occurring in below treeline terrain at 9000' and below.

Pit dug in near treeline terrain.

PST 3/100 END @ 76cm on buried surface hoar layer with a 20cm artificial slab, approximately 1F- hardness. Test performed similar to Birkeland/ van Herwijnen to INCREASE LOAD ON WEAK LAYER FRACTURE.

Pit nearby a previous pit to compare pwl