AROUND MIDDAY on Sunday, February 19, a group of 13 skiers headed into a backcountry area just outside Washington’s Stevens Pass ski resort. The skiers were on a trip organized by Stevens Pass marketing director Chris Rudolph, and the group included professional freeskier Elyse Saugstad, former Outside staffer and current ESPN Freeskiing editor Megan Michaelson, Powder magazine editor John Stifter, and World Freeskiing Tour official Jim Jack. In Washington that weekend, and perhaps anywhere in the country, it would have been difficult to find a more experienced group in the mountains, and all were equipped with what has become standard gear among backcountry skiers: an avalanche beacon, a rescue shovel, and a probe.
The day before, Stevens Pass had received 19 inches of new snow, and the group, aware that the avalanche danger on Sunday was not insignificant, skied one at a time to minimize the risk that more than one person would be caught if an avalanche broke loose. Four skiers navigated the first 300 vertical feet toward Tunnel Creek Canyon, then stopped in what they believed was a safe zone near the treeline. The fifth skier triggered an avalanche.
The slide started small but grew to 200-yards wide and swept into the stand of old-growth trees where Saugstad was standing. As she felt the slide hit, Saugstad pulled a toggle on the left shoulder strap of her backpack, ABS Avalanche Airbag Systems’ pink Vario 18 model, and inflated twin 85-liter balloons. The avalanche carried Saugstad, Jack, Rudolph, and a third man, John Brenan, 2,000 feet downhill. When it stopped, Saugstad was mostly buried, with only her head and hands exposed, and unable to move. Of the four skiers caught in the heart of the slide, Saugstad was the only one wearing an avalanche air bag, and the only one to survive.
Avalanche air bags have been widely available in Europe since 1985 and in the United States since 2007, when relaxed federal regulations made the high-pressure canisters that inflate the balloons easier to transport. Today, air bags are surging in popularity among backcountry skiers, snowboarders, and snowmobilers, in part because of the packs’ reputation for keeping avalanche victims alive—a famous 2008 study found that skiers and riders with properly deployed air bags survived avalanches 97 percent of the time—and because of several dramatic videos showing skiers riding out major slides wearing them.
The professional snow-safety industry has taken notice, and in the past three years, several ski resorts, including Wyoming’s Jackson Hole, have started issuing bags to ski patrollers. This year, Work Safe BC, British Columbia’s occupational-safety organization, is investigating whether heli-skiing guides should be required by law to wear air bags on the job.
THE AVALANCHE AIR BAG was developed by Josef Hohenester and Peter Aschauer in Germany in the early 1980s. After witnessing a deadly avalanche while skiing with friends, Aschauer, a German businessman, began testing air bag prototypes, eventually starting ABS and selling the world’s first commercial pack in 1985. Over the next 15 years, Aschauer’s design was bolstered by studies from the Swiss Federal Institute for Snow and Avalanche Research, in Davos, that explained why air bags seemed to work so well.
Rather than floating through snow like life preservers, air bags keep avalanche victims near the surface of a slide through a process known as inverse segregation. In high-velocity slides, the bags act like rocks shaken together in a bucket full of sand and gravel: larger particles rise to the top, smaller ones settle to the bottom. Air bags, according to American Avalanche Association president Dale Atkins, turn us into larger particles.
The available evidence suggests that staying on top in a slide is incredibly important. One study by FISAR found that victims who remain on the surface survive 96 percent of the time, and another study found that air bags kept victims from being buried 92 percent of the time. In the most comprehensive look at avalanche air bag incidents—the oft-cited 2008 study—of 262 skiers who were caught in slides with properly deployed bags, only seven, or 3 percent, were killed. By contrast, avalanche victims who are buried with no gear survive less than 30 percent of the time, and victims buried with only a beacon survive less than 50 percent of the time.