Skier triggered Avalanche near Splains Gulch

Avalanches: One skier triggered R1, D1 soft slab Avalanche. Skier caught but not buried. Crown height approximately 35cm. Failed at the interface between basal facets and the snow from last weeks storm cycle. Starting zone angle approximately 37 degrees.
Weather: Overcast. Light snowfall and light wind, no snow transport observed. 3:00pm.
Snowpack: Snowpack is minimal at this elevation, only measured 40-50cm of total snow. Snow from the past storm cycles have come in right side up but it is sitting on top of 1-2cm of basal facets.