Quick report
We skied northeast slope from the subridge at 47°15'18.94"N 113°43'41.71"W after digging a pit and finding an unreactive ECT. There was at least 3' of storm snow. The first snowboarder descended without incident, but I chose a slightly steeper line and skied down the bottom 200' of terrain. Upon looking back up the slope, we realized that the entire lookers right of what we skied, but not what we skied, had broken on the storm layer. Avalanche broke over 1000' wide, did not inspect debris, but suspect it was a storm slab. There were no other signs of recent avalanches or instability the entire rest of our day.