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Avalanche Forecast

Archived

Apr 24th, 2024–May 4th, 2024

Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.

Regions

Kananaskis, Bow Valley, Highwood Pass, North 40, Spray - KLakes.

Spring Conditions means avalanche danger may be variable and can easily range from Low to High throughout the day.

Confidence

High

Snowpack Summary

In most areas, a melt-freeze crust exists on all aspects. This crust is supportive and locks down all basal weaknesses when it is frozen. This crust will tend to break down with solar radiation, daytime heating or a cloudy night without a freeze. Once this occurs, the basal facets can be more easily triggered by the weight of a skier, a cornice or a wet avalanche from daytime heating. It will be important to monitor the crust and adjust your trip accordingly. Convective Spring flurries with significant amounts of snow is not uncommon and difficult to forecast. In a nutshell, the avalanche hazard rating can vary dramtically from day to day and also hour to hour. Usually, an early start and early finish is a good way to go. Check out "Spring Conditions" write up at: :  https://avalanche.ca/spring-conditions

Weather Summary

More details can be found in the Mountain Weather Forecast.

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.