Most avalanches occur after a big snowstorm ... “Thirty-eight degrees is like the magic number in Colorado for slope angle,” Mr. Roman said. Even if it doesn’t trigger naturally, a human ...

Avalanche Canada is warning about dangerous avalanche conditions in the Rocky Mountains of southern Alberta and British Columbia.

“These types of avalanches, they can be triggered when you’re on this slope. They can be triggered ... that people stick to the lower angle slopes because this is not something we want to ...