{"blocks":[{"key":"ebqn","text":"Freezing level is expected to jump to 2300 m on Sunday with intense solar radiation. Alpine temperatures are forecast to rise from -20 C to 0 C in the span of 24 hours. This significant warm-up is expected to rapidly destabilize the surface snow and cornices as well as add significant strain to buried weak layers.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"fl26","text":"Over the past few days, strong arctic outflow winds formed wind slabs in a reverse-loading pattern. Last week's storm delivered 30-60 cm of new snow to the region with strong southwest winds creating ample snow available for wind transport. The recent snow is sitting on a weak layer of surface hoar buried 30-60 cm deep in many areas, especially in sheltered areas at treeline and below treeline. See this MIN from the Shames area that shows this layer when it was on the surface. Observers have reported widespread whumpfing and propagation in snowpack tests on this March 9th surface hoar, confirming its propensity for human triggers. ","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[{"offset":287,"length":12,"key":0},{"offset":407,"length":3,"key":1}],"data":{}},{"key":"3obni","text":"There are several additional layers of surface hoar that are now buried 70-120 cm and 110-160 cm deep that may also be the most prominent around treeline. On south through west facing slopes, this surface hoar may be sitting on a crust, which may increase the potential for triggering avalanches on these layers. ","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"cv3bg","text":"A weak layer of facets that formed in January may be found about 150 to 200 cm deep, and an early season melt-freeze crust lingers at the base of the snowpack. These layers have produced a few very large natural and explosive triggered avalanches over the past two weeks. Sunday's warm-up may have the potential to re-awaken these deeper layers.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[{"offset":16,"length":6,"key":2}],"data":{}}],"entityMap":{"0":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://www.avalanche.ca/glossary?q=persistent+weak+layer#surface-hoar"}},"1":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://www.avalanche.ca/mountain-information-network/submissions/87d5421f-666e-423b-8eca-66dcffb8052a"}},"2":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://www.avalanche.ca/glossary?q=crust#faceted-snow"}}}}