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Keith Johnson, Deseret News
From left, Barb Eastman, Molly Hutsinpiller and Tom Kimbraugh walk past an avalanche safety sign that also tests skiers' avalanche beacons before they head out Thursday for a day of backcountry skiing at the Alta Ski Resort.

Barb Eastman, Molly Hutsinpiller and Tom Kimbraugh walk past an avalanche safety sign that also tests skiers' avalanche beacons before they head out Thursday for a day of backcountry skiing at the Alta Ski Resort. Bruce Tremper, director of the U.S. Forest Service's Utah Avalanche Center, shows layers of snow that are analyzed in avalanche forecasting at Alta.