This video summarizes an objective way of assessing a snow profile - whether or not the snow is likely to be skier triggered. Most of the calibration data came from the Columbia Mountains of western canada.
To read the paper behind this video, search for: asarc yellow flags
To read McCammon and Schweizer's paper on lemons, search for: Mcammon lemons.
Bruce Jamieson and Juerg Schweizer, 2015, CC by-nd.