Dramatic Moment Snowboarder Triggers Avalanche on New Hampshire Mountain

A snowboarder triggered – and then outpaced – a slab avalanche on Mount Washington in Sargent’s Purchase, New Hampshire, on November 29.

Andrew Drummond captured this video showing the moment a layer of snow started sliding behind a snowboarder carving down Tuckerman Ravine.

According to Mount Washington Avalanche Center (MWAC) observation data, the avalanche was reported as a “small, thin wind slab.”

A wind slab avalanche is the “release of a cohesive layer of snow (a slab) formed by the wind-drifted snow,” according to avalanche.org. Credit: Andrew Drummond via Storyful