Snowboarder killed in Immersion accident in WA… Link to safety video, please watch…

Snow immersion

Snow Immersion Suffocation (SIS hazards)A deep snow or tree well immersion accident occurs when a skier or rider falls into an area of deep unconsolidated snow and becomes immobilized and suffocates. Deaths resulting from these kinds of accidents are referred to as an SIS harzard or Snow Immersion Suffocation.

A good BCS Video on Tree well immersion: