{"blocks":[{"key":"64dc1","text":"15-35 cm of new snow falls over faceting wind affected surfaces in the alpine, a melt-freeze crust on steep solar aspects & low elevations and a widespread layer of large surface hoar crystals, especially prominent in shady, wind sheltered areas at elevations near the top of the previous valley fog layer (1200-1500 m). New snow is expected to adhere poorly at this interface.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[{"offset":171,"length":12,"key":0}],"data":{}},{"key":"4tgc0","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"2r34t","text":"There are three prominent layers in the upper snowpack which have been largely dormant during the dry spell but may become reactive with new snow loads. These include a layer of surface hoar down 20-30 cm, a layer of facets and/or surface hoar from early January down around 40-60 cm, and a thick layer of facets from the end of December down close to 1 m.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"3n6ji","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"5ffpb","text":"The primary weak layer that remains a widespread concern across the Columbia Mountains is a deeply buried crust/facet layer that formed in early December. It is typically down 100-180 cm, but as deep as 250 cm in wind-loaded terrain. This layer is likely to plague our snowpack for the remainder of the season and will be a low probability but extremely high consequence result if triggered. Check out our latest forecaster blog on the crust that never dies.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[{"offset":322,"length":48,"key":1},{"offset":413,"length":15,"key":2}],"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/terms/low-probability-high-consequence"}},"2":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://www.avalanche.ca/blogs/the-crust-that-never-dies"}}}}