Regions
Banff Yoho Kootenay.
Although the danger is rated as moderate by definition, steep alpine slopes that have not previously avalanched should be treated as highly suspect.
Weather Forecast
Clear skies and temps around -10 persist. These weather conditions will have little affect on the danger rating.
Snowpack Summary
In the alpine a few cm`s of new snow overlies widespread wind slabs created by recent strong SW winds. At treeline and above, mild temperatures have helped strengthened the upper snowpack but the basal rain crust/facets remain weak. Below treeline a rain crust is present and the moist snow is gaining strength rapidly with the cooler temps.
Avalanche Summary
No avalanches were observed or reported in the forecast region today.
Confidence
Due to the quality of field observations
Problems
Deep Persistent Slabs
Deep Persistent Slab avalanches are the release of a thick cohesive layer of hard snow (a slab), when the bond breaks between the slab and an underlying persistent weak layer deep in the snowpack. The most common persistent weak layers involved in deep, persistent slabs are depth hoar or facets surrounding a deeply buried crust. Deep Persistent Slabs are typically hard to trigger, are very destructive and dangerous due to the large mass of snow involved, and can persist for months once developed. They are often triggered from areas where the snow is shallow and weak, and are particularly difficult to forecast for and manage.