Check out this article by Tess Weaver on ESPN.com about the cycle of Avalanches in the West this past week: http://sports.espn.go.com/action/freeskiing/news/story?id=6300200
Human triggered Avalanches occurred in Wyoming, Washington, Utah, & Colorado this week. Unfortunately, slides in Utah, Washington, and Colorado were fatal. Huge snowfalls followed immediately by high temperatures caused these avalanches. All of the avys happen after 12pm. Lets all continue to be careful out there.