A former Allegheny County man was killed this weekend by an avalanche in Wyoming. Kenneth Goff, 36, was leading a group of skiers through the backcountry near Grand Teton National Park when they accidentally triggered a snow slide. He was buried under several feet of snow.

Teton County Search & Rescue was called to respond to an avalanche burial on Togwotee Pass. It killed one skier and injured another.

According to the U.S. Department of Agriculture’s website, a person trapped under the snow following an avalanche might not have more than 20 to 30 minutes to survive. The department also said there are about 100,000 avalanches annually in the U.S., resulting in an average of 28 deaths.