Jill Fredston, 56, is a longtime avalanche forecaster and educator in Alaska who coauthored “Snow Sense” with her husband and fellow avalanche guru, Doug Fesler. Here’s an excerpt from our conversation on 20 years of education, safety and snow science.

Bruce Tremper, 61, has been director of the Utah Avalanche Center since 1986 and is the author of the seminal book “Staying Alive in Avalanche Terrain.” Here’s an excerpt from our conversation on 20 years of education, safety and snow science.

Brian Lazar, 40, is the deputy director of the Colorado Avalanche Information Center and the former executive director of AIARE. He is based in Boulder, Colorado. Here’s an excerpt from our conversation on 20 years of education, safety and snow science.

Manuel Genswein, 40, is a native of the Swiss Alps who lives in Meilen and has done snow-safety work in 29 countries. Using an electronic engineering background, he has also developed rescue products and techniques that have been applied around the world. Here’s an excerpt from our conversation on 20 years of education, safety and snow science.

Ilya Storm, 50, is the forecast coordinator for Avalanche Canada. Storm lives in Revelstoke, B.C., just down the road from Rogers Pass. Here’s an excerpt from our conversation on 20 years of education, safety and snow science.

Karl Birkeland, 51, is a longtime avalanche forecaster and director of the U.S. Forest Service National Avalanche Center in Bozeman, Montana. Here’s an excerpt from our conversation on 20 years of education, safety and snow science.