{"blocks":[{"key":"891ie","text":"A surface crust exists up to around 2000 m. The top 20-40 cm of the snowpack is composed of some elevation dependent permutation of a crust sandwich, formed by fluctuating freezing levels during the last storm. A layer of surface hoar (or another crust) may sit beneath the recent storm snow in sheltered terrain.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[{"offset":222,"length":12,"key":0}],"data":{}},{"key":"2la0g","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"3ubss","text":"Two weak layers are buried in close proximity to one another. They are 70 to 130 cm deep. The layers are composed of surface hoar and faceted grains and they overlie a hard melt-freeze crust. This recent MIN report observed from Rossland on Wednesday the 13th shows good evidence of a large natural slab avalanche failing on the early December persistent layer during or post-storm. This suggests that it remains possible for riders to trigger these layers.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[{"offset":117,"length":12,"key":1},{"offset":134,"length":7,"key":2},{"offset":204,"length":10,"key":3}],"data":{}},{"key":"74b0f","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"cq2qh","text":"Another layer of faceted grains above a melt-freeze crust that formed in early November is upwards of 200 cm below the surface. This has been the suspected failure layer of a few very large avalanches that released last week in the Rossland range.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}}],"entityMap":{"0":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://www.avalanche.ca/glossary#surface-hoar"}},"1":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://www.avalanche.ca/glossary?q=surface+hoar#surface-hoar"}},"2":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://www.avalanche.ca/glossary?q=facet#faceted-snow"}},"3":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://www.avalanche.ca/mountain-information-network/submissions/111f5885-061c-4e7f-9d8e-f79d8d2df6bb"}}}}