In response to COVID-19 and the temporary suspension of many of Parks Canada’s visitor services, public avalanche bulletins will no longer be issued for the remainder of the 2020 spring season. This is a time to avoid the backcountry. Please stay home to help limit the spread of COVID-19, and to minimize demands placed on emergency response teams and the health care system.
Insufficient observations exist to reliably rate the avalanche danger. Expect shallow snow cover with thinly buried rocks and trees just beneath the surface. Avalanche danger often concentrates in gullies and other deposition areas, where windslabs may bond poorly to a weak underlying base. Deeper snow usually exists at higher elevations.
Naturally triggered avalanches up to size two have been observed from alpine start zones over the past week.
Deep persistent slabs are best managed by:
Cornices are best managed by:
Sadly there isn't any significant snow in the forecast. Flurries will bring ~5cm Friday night, and another 5cm on Saturday before cold arctic air moves in with clearing on Sunday. With only 25cm forecast over the next week, expect rugged conditions to continue for a while yet. Check the Mountain Weather Forecast for updates.
The snowpack is slowly building at treeline and above, but diminishes rapidly as you lose elevation, with only 13cm at Rogers Pass (the highest point you can start your tour). 80-110cm of snow can be found at treeline but expect more in alpine lees. Inconsistent but moderate sudden planar test results observed on a crust sitting 30cm above ground.
Several loose and thin slab avalanches up to size 2 were observed from solar aspects on Wednesday. Over a week ago, loose snow avalanches from Macdonald's N face ran more than 100m over bare ground, demonstrating that the valley bottoms are susceptible to overhead hazard even if they are not snowbound.