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Avalanche Forecast

Archived

Apr 5th, 2023–Apr 6th, 2023

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Little Yoho.

The snow quality on shaded aspects (north and east) is good, but lots of surface crusts exist on the sunny slopes (south and west). The sun may peek out for a little longer on Thursday so watch locally for solar input in steep terrain.

Confidence

Moderate

Avalanche Summary

No avalanches were observed or reported today.

Snowpack Summary

20cm of previous snow overlies sun crusts to ridgetop and temperature crusts below 1500m. The mid-pack in this area is generally strong, although the base of the snowpack consists of weak facets in thin areas (<2 m).

Weather Summary

Thursday: Freezing levels 1800-2000m and light to moderate SW winds in the alpine.

Friday: Cloudy skies, 50km/h alpine winds and freezing levels 2000-2200m. Some snow will develop in the afternoon with 2-5cm possible.

For a detailed weather forecast click here.

Terrain and Travel Advice

  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.

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.