{"blocks":[{"key":"bihbo","text":"On Tuesday, numerous natural avalanches and cornice failures up to size 2 where observed in the alpine and treeline on a helicopter flight near Whistler. Cold temperatures may have made cornices facetted and weak, highlighting the importance of avoiding overhead hazard and giving them a wide berth when travelling at ridge crest. Cornice failures have the potential to create a large load on the snowpack and trigger deeper persistent weak layers.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[{"offset":254,"length":15,"key":0},{"offset":318,"length":11,"key":1}],"data":{}},{"key":"aim56","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"b44gs","text":"Small (size 1) wind slab avalanches were observed on south aspects on Monday as a result of reverse loading from northerly wind. There were also some small human triggered wind slabs over the weekend, including this one from Gin Peak that illustrates how wind patterns earlier in the week have left slabs in atypical locations. With today's northerly outflow winds, we can expect to continue finding reactive wind slabs in unusual locations.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[{"offset":225,"length":8,"key":2}],"data":{}},{"key":"72tvm","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"2pned","text":"We have been paying close attention to the early December crust, which has formed a persistent weak layer in the region. The last reported avalanche on this layer was on Dec 24, but it produced several notable avalanches around Dec 16 at elevations between 1800-2100 m. This size 2.5 skier-triggered avalanche occurred on a northwest facing slope around 2100 m in the Blackcomb backcountry, and propagated between some shallowly buried rocks.","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"5ebl5","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"c99ao","text":"Learn more about how this persistent weak layer is developing in our latest forecaster blog!","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[{"offset":69,"length":22,"key":3}],"data":{}},{"key":"a9uru","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"6sm0i","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}},{"key":"fn0pt","text":"","type":"unstyled","depth":0,"inlineStyleRanges":[],"entityRanges":[],"data":{}}],"entityMap":{"0":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://avalanche.ca/glossary#overhead-hazard"}},"1":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://avalanche.ca/glossary#ridgetop"}},"2":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://avalanche.ca/mountain-information-network/submissions/f6e1a912-0894-4836-815d-c1be10109311"}},"3":{"type":"LINK","mutability":"MUTABLE","data":{"url":"https://www.avalanche.ca/blogs/dont-trust-a-robust-crust"}}}}