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Avalanche Forecast

Archived

Feb 21st, 2024–Feb 22nd, 2024

Alpine
Natural avalanches unlikely.
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.

Little change to the conditions is expected until the wind picks up on Friday and snow on Saturday.

Confidence

Moderate

Avalanche Summary

No avalanches were observed or reported in Little Yoho on Wednesday.

Snowpack Summary

Moist snow below 1650m. Sun-crust exists on steep solar aspects and isolated wind slabs can be found in the high alpine. There is 10-25 cm of facetted snow over the Feb 3 crust. In shallower snowpack areas weak facet layers can be found in the mid and lower pack.

Weather Summary

On Thursday, a mix of sun and cloud across the forecast region as moderate to strong moist, westerly flow continues. Trace accumulations are expected, except up to 2 cm for western-facing aspects. Freezing levels will rise to between 1600 and 1800m in the afternoon. Up to 15cm of snow is expected on the weekend.

For more information be sure to check AvCan's Mountain Weather.

Terrain and Travel Advice

  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.

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.