{"blocks":[{"key":"cbi8e","text":"Several more skier triggered avalanches occurred in the region on Sunday. See reports here, here, and here. Although the St Jacob's slide looks to have been a wind slab, it may have run on the same persistent weak layer associated with other recent avalanches in the region. The Allison Pass avalanches seem more definitively associated with this layer. Each highlights the challenging risk management scenario we're currently in.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[{"offset":86,"length":4,"key":0},{"offset":92,"length":4,"key":1},{"offset":102,"length":4,"key":2}],"data":{}},{"key":"5go73","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"14evb","text":"Another near miss associated with our late January persistent weak layer occurred in the area of Spectrum Peak, near Rainbow Mountain (Sea to Sky) on Sunday. At least three large avalanches with 1-2 metre crown fractures were remotely triggered by a group of hikers. Fortunately no one was caught. Wind loading at the start zone may account for fracture depths that exceed the typical burial depth of the suspected weak layer.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"6lnq7","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"dfbkq","text":"On Saturday a fatal avalanche occurred in the Duffey Lake area. This avalanche was a very large (size 3), skier triggered avalanche with significant propagation. It was triggered at upper treeline on a northeast aspect and it failed on a shallower layer of surface hoar before stepping down to the crust from late January referred to above and discussed in our snowpack summary. A more detailed report can be found here. This layer was also responsible for several large skier triggered avalanches in the neighbouring Sea to Sky region.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[{"offset":415,"length":4,"key":3}],"data":{}},{"key":"ah7qf","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"dpig5","text":"We anticipate a significant increase in the likelihood of avalanches on this layer during the warming pattern from Wednesday onward.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}}],"entityMap":{"0":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://www.avalanche.ca/mountain-information-network/submissions/eb303049-32a7-403e-a768-6e731592cac2"}},"1":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://www.avalanche.ca/mountain-information-network/submissions/4ea569c9-969b-48be-9e41-578c214916bb"}},"2":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://www.avalanche.ca/mountain-information-network/submissions/c5781dc7-87d9-11ec-a2ac-fe8d7b0a742f"}},"3":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://www.avalanche.ca/map?panel=fatal-accidents%2Ffatal-avalanche-accident-cassiope-peak-20220205"}}}}