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Avalanche Forecast

Archived

Feb 17th, 2025–Feb 18th, 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

Little Yoho.

Although not listed as a problem, be aware that on steeper terrain, surface facets can accumulate and contribute to small loose dry avalanches. Pay attention to how these sluffs interact with terrain traps, as even small slides can have consequences.

Confidence

High

Avalanche Summary

The Parks Canada field team observed several solar-triggered loose dry avalanches (size 1) originating from extreme rocky terrain. Otherwise nothing new observed or reported.

Snowpack Summary

Spotty surface hoar growth up to 7mm has been observed on the snow surface. Beneath that, about 25cm of settled snow sits over the Jan 30 weak layer, with aging wind slabs lingering in isolated areas. Specific wind-exposed terrain may also feature sastrugi. The mid and lower snowpack remains well-settled, with tree-line snow depths ranging from 120cm to 180cm.

Weather Summary

Another chilly day ahead, with overnight lows dropping to around -15°C in the valley and -18°C at the ridge. Daytime highs will climb to about -7°C. Winds remain light and variable. Expect clear skies in the morning, with clouds moving in by the afternoon. Still no significant snowfall on the horizon.

Terrain and Travel Advice

  • Be careful as you transition into wind-affected terrain.
  • Wind slabs are isolated, but may remain reactive.

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.