Avalanche Forecast
Regions: Little Yoho.
Although we have more snow in areas west of the divide, the deep persistent problem remains a layer of concern.
With low-likelihood/high-consequence avalanche problems, the best line of defense is conservative terrain selection.
Confidence
High
Avalanche Summary
Ski areas are reporting reactivity of the recent snow that sits on the early Febuary crust. Resulting in avalanches up to size 1.5.
Skiers triggered a size 2.5 slab on a S aspect at 3050 m on Mt Vaux on Thursday while boot-packing.
A size 2 and 2.5 skier-triggered deep persistent slab at 2750 m on a SE aspect in the Cirque Forepeak area occurred Tuesday.
The deeper layers can still be triggered in thin snowpack areas at high elevations.
Snowpack Summary
Suncrust on steep solar aspects. Isolated wind slabs in the alpine. 10-25 cm of facetted snow over the Feb 3 crust. The crust is found in most locations except above 2500 m on N aspects, and varies in thickness from 0.5-15 cm with a thicker crust in deeper snowpack areas and at lower elevations. Persistent weak facet layers remain present in the mid and bottom of the snowpack and have recently produced avalanches on the ground in rocky thin snowpack areas at higher elevations.
Weather Summary
A few clouds during the day on Monday, become mainly cloudy at night, making isolated flurries a possibility for most regions. Moderate to strong westerly ridgetop winds. Freezing levels near valley bottom, with the alpine high of -6 C during the day.
For more information be sure to check AvCan's Mountain Weather.
Terrain and Travel Advice
- Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
- Avoid rock outcroppings, convexities, and anywhere the snowpack is thin and/or variable.
Avalanche Problems
Wind Slabs
Winds from a variety of directions have formed small isolated wind slabs on multiple aspects in alpine lee areas over the Feb 3 interface. In some places, these can be triggered by humans. Use caution near ridgecrests and when entering steep, confined terrain.
Aspects: All aspects.
Elevations: Alpine.
Likelihood: Unlikely - Possible
Expected Size: 1 - 2