Summary
Confidence
High
Weather Forecast
Up to 30mm of precipitation is forecast for Wednesday night with another 20cm of snow expected on Thursday. Ridgetop winds will remain extreme from the southwest while freezing levels will drop throughout the day from 2000m to about 1500m. On Friday and Saturday the region will see generally light flurries, significantly decreased winds and freezing levels around 1000m.
Avalanche Summary
In recent days, backcountry avalanche observations have been extremely limited, mostly due to stormy weather. Looking forward, continued warm, wet and windy weather is expected to spark ongoing storm slab activity in high elevation lee terrain, but warm temperatures and loading will also increase the likelihood of waking up any lingering persistent weaknesses that were not triggered by last week's storm.
Snowpack Summary
On Wednesday night and Thursday morning, moderate to heavy snow and strong winds will continue to form deep and dense storm slabs in high elevation terrain and cause substantial cornice growth. At treeline and below, rain is forecast to further saturate the snowpack. In many areas, the early and mid-January surface hoar layers have been wiped-out by last week's storm and subsequent avalanche cycle; however, "sudden" test results and isolated persistent slab avalanches prove these interfaces should remain on your radar. These layers would be down between 80 and 150 cm deep, and still have the capacity to surprise with nasty consequences. The mid and lower snowpack is generally strong, with the exception of shallower snowpack areas that may be more faceted.
jlammers,
Avalanche Canada
