Wind slab on lower Trimmer

After skiing more moderate slope angle terrain on similar NW aspect and elevation without observing any signs of instability (no cracking or whumfing, no other avalanches, unconsolidated snow), we (party of 4) decided to investigate a steeper slope. We stopped at a safe spot to observe and make a plan for skiing the steeper face, planning to avoid the area of the slope to the skier's left with some small wind affected ridges visible in the snow. The steep face occurred at a convex rollover near a rock band. First skier traversed in a ski cut across the top of the slope toward snow that did not look as wind affected when the slab broke under their feet. Skier was able to continue skiing out of the slab and stopped at a safe place while the slab ran behind them. The rest of the party was able to traverse high without entering the steep face. The crown was probably a foot deep at its tallest, average depth 6 inches, and propagated farther left and down the slope than expected given how dry and loose it seemed. Probably unlikely to bury anyone, but could have knocked a skiier off their feet and pushed them into a tree or treewell, as the debri/run out continued into the trees below.