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Archived

Avalanche Forecast

Feb 24th, 2025–Feb 25th, 2025
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Little Yoho.

The snowpack is gradually adjusting to the new load from the recent storm. While minimal natural avalanche activity has been observed since the storm, several human-triggered avalanches have been reported over the past two days. Conservative terrain choices will be the best risk mitigation strategy over the next few days.

Confidence

Moderate

Avalanche Summary

The local ski hills reported triggering several avalanches today using explosives and ski cuts, up to size two.

A skier accidental size 2 wind slab that likely propagated on the facets under the storm snow was observed on Twin Cairns Sunday, with one person going for a rocky ride but ending up relatively unscathed.

Snowpack Summary

10-30 cm of new snow has fallen with mild temps and strong S-SW winds helping to form new wind and storm slabs. This new snow sits over a layer of weak facets, surface hoar or sun crust from the cold snap.

The mid and lower snowpack is mostly well-settled, though it is heavily facetted in thin snowpack areas. Tree-line snow depths range from 120 cm to 180 cm.

Weather Summary

A southwest flow may bring light flurries to the forecast region on Tuesday, with snow accumulation ranging from 0 to 5 centimeters by Wednesday. Ridgetop winds are expected to be moderate, coming from the W-SW. Daytime high temperatures will be around +5°C at the valley bottom on Tuesday.

Terrain and Travel Advice

  • Make conservative terrain choices and avoid overhead hazard.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.
  • Loose avalanches may step down to deeper layers, resulting in larger avalanches.

Avalanche Problems

Persistent Slabs

10-30 cm of new snow and strong S-SW winds have loaded lee areas at treeline and above with new slabs up to 60 cm deep. This is sitting on a weak layer of facets, surface hoar or sun crust. Human triggering will remain likely in steep or wind loaded terrain for the next few days.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2.5