100 cm of storm snow over the weekend is still very sensitive! Stick to low angle terrain and away from big slopes.
Weather Forecast
Light snow beginning Monday afternoon with 10 cm possible with light SW winds. Clearing and cooling on Tuesday and then very warm conditions into the weekend.
Snowpack Summary
Huge variation in the snowpack across the forecast region!! The Icefields Area received around 1 meter of snow since Friday while areas to the north received much less. Sensitive storm slab can be found on all aspects at treeline and above. Rain and freezing rain fell below treeline in most areas.
Avalanche Summary
The natural avalanche cycle continues with slides up to 2.5 involving the new storm snow. Avalanche control efforts along the Icefields Parkway produced large avalanches around Polar Circus.
Confidence
Timing or intensity of solar radiation is uncertain on Tuesday
Problems
Storm Slabs
Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.
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.