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Avalanche Forecast

Archived

Feb 25th, 2025–Feb 26th, 2025

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Little Yoho.

Snowpack slowly adjusting, but human triggering remains a risk.

Avalanche control is being conducted on Mt. Field, Mt. Dennis and Mt. Stephen Wednesday Feb 26. These areas are CLOSED.

Confidence

Moderate

Avalanche Summary

No avalanches were observed or reported in Little Yoho today. However, check avalanche summary in adjacent Banff forecast for a report of a skier accidental today near Lake Louise.

Snowpack Summary

30-35 cm of well settled storm snow at treeline with mild temps and strong S-SW winds helping to form new wind and storm slabs. This 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

Valley temperatures will hover just below freezing, with ridge temperatures warming to -6°C by Wednesday afternoon. Expect minimal snowfall with persistent cloud cover. Winds will be strong and sustained from the west.

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.

Problems

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.