Avalanche Forecast

Archived

Jan 7th, 2025–Jan 8th, 2025

Alpine

Natural avalanches unlikely, human triggered possible.

Treeline

Natural avalanches unlikely.

Below Treeline

Natural avalanches unlikely.

Alpine

Natural avalanches unlikely, human triggered possible.

Treeline

Natural avalanches unlikely.

Below Treeline

Natural avalanches unlikely.

Alpine

Natural avalanches unlikely, human triggered possible.

Treeline

Natural avalanches unlikely.

Below Treeline

Natural avalanches unlikely.

Regions

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

Some snow and strong winds will develop some fresh wind slabs. Approach open terrain with caution.

Confidence

High

Avalanche Summary

NO new avalanches were seen along the Spray.

Snowpack Summary

The surface snow has faceted and is providing good skiing. Expect some wind slab development in isolated areas such as cross loaded gullies and the lee sides of mountain passes. The snowpack varies a lot. Thicker areas at tree line and above with close to 100cm of snow has a much denser snowpack while most areas below treeline are only 40-50cm and consist mostly of facets(sugar snow).

The weak basal facets are still a concern and have a potential to be triggered from thin snowpack areas which are still plentiful at this time.

Weather Summary

Please click on the image below for the weather. Note that "Tomorrow" is Wednesday's weather. Weather models are not in agreement with wind and snow amounts. Expect up to 8cm of snow with strong NW winds.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

Be mindful that deep instabilities are still present in the snowpack.
Avoid freshly wind-loaded terrain features.
Carefully evaluate steep lines for wind slabs.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.