A profile obtained at the crown of the avalanche revealed a stout melt-freeze crust (1 cm) at the bed surface with a widely visible layer of 1-2 mm graupel grains (deposited at the start of the storm on Saturday, Feb 4) visible on the crust surface. The slab was 40-60 cm thick, top half was 4F, bottom half was 1F (see photo).
A second riding group reported a human triggered slab avalanche later in the afternoon in an adjacent zone, around 2 pm. The avalanche occurred in terrain with a similar aspect and elevation as the earlier slide. They reported that the slide was larger than the earlier slide, propagating several hundred feet wide and traveling over the initial runout and several hundred feet into the valley below. Unverified estimates suggest a size 2.5 avalanche with a crown around 50 cm +/-. The slide was reportedly triggered as the snowboarder made a heel-side turn at a convexity in the terrain. The rider escaped without further incident, and no one was in the runout below.