Avalanche Forecast
Issued: Feb 12th, 2021 8:00AM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Wind Slabs and Persistent Slabs.
jonas hoke,
With temps below -20 C, and daily MIN reports of skiers/riders triggering avalanches, it doesn't really seem like the time to tackle big objectives.
Summary
Weather Forecast
Temperatures will gradually warm up through the weekend as the Arctic high begins to break down.
Today: Sunny, Alpine High -17 C, Moderate Northerly winds.
Tonight: Clear, Low -18 C, Moderate E wind.
Saturday: Mix of sun and cloud, High -16 C, light SE wind.
Sunday: Sunny with cloudy periods. Low -16 C, High -15 C. Light S wind.
Snowpack Summary
Renewed Northerly winds have added to previously formed slabs in exposed areas, these are facetting quickly, but remain reactive in lees. Facetting of surface snow is also making sluffs possible in steep terrain. A weak interface of a suncrust with facets and surface hoar, was buried in late January and is now down 60-100cm. Cornices are weakening.
Avalanche Summary
Skiers triggered windslabs on the standard uptrack for Avalanche Crest yesterday.
A group of skiers had a close call Wednesday on the South face of Corbin Peak, triggering a couple of large avalanches on the Jan 24th persistent weak layer.
A skier-triggered sz 2 windslab on Bagheera was reported Tuesday.
Confidence
Problems
Wind Slabs
Alpine winds have been steadily blowing moderate from the North for the past 36hrs; expect windslabs in unusual places.
- Be careful with reverse loaded pockets of wind slab at ridgeline.
Aspects: East, South East, South, South West, West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Persistent Slabs
The January 24th weak interface may be triggerable on solar aspects, where facets and/or surface hoar is sitting on a suncrust.
The bond at this interface may be weakening, with cold temps promoting facetting.
- Dig down to find and test weak layers before committing to a line.
- Be wary of slopes that did not previously avalanche
Aspects: South East, South, South West.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Feb 13th, 2021 8:00AM
