Rockbound Lake Couloirs

After climbing the Chockstone Couloir we switched over and just before making my first turn I popped a soft slab below and to the skier's right of my position. The slab turned to powder quickly, ran fast in the steep terrain and filled in our bootpack track. Not a big one but big enough for the terrain we were in if caught (skinny/steep couloir that curves back and forth before reaching the fan) and calling it a 1.5 due to trauma possibilities.