Two skiers were boot-packing up Mt. Superior from the base while two skiers were skiing down from the peak above. The skiers above triggered a wet slide that slid all the way to the bottom wiping out one of the hikers. He was carried on the surface for a good twenty feet and was not buried. I skied Flagstaff at 10:00am and I watched this slide from Alta. It is too warm to ski south facing slopes at 2:30pm. Use caution by skiing early (before the snow heats up) or ski north facing slopes.