In April 2017, a lone hiker arrived at the summit of Mount Harvey, a 5,420-foot peak north of Vancouver. He had fallen behind his group on the ascent and when he reached the top in deep snow, all he ...

Cornices are most volatile during wild weather swings. If it’s cold in the morning but rapidly warms throughout the day, cornices can be susceptible to collapse. Consistent winds between 15 and 25 ...