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Avalanche Forecast

Archived

Apr 25th, 2024–Apr 26th, 2024

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

Regions

Banff Yoho Kootenay, Little Yoho, Banff, East Side 93N, Kootenay, Lake Louise, LLSA, Sunshine, West Side 93N, Field.

An upslope storm will bring a small return to winter by Friday mid morning. The new snow may sluff easily on hard crusty surfaces.

Confidence

Moderate

Avalanche Summary

No new avalanches were observed or reported on Thursday

Snowpack Summary

2-15 cm of snow forecasted by Friday AM will cover hard surface crusts on all aspects except for north facing alpine slopes above ~2300 m. Be on the lookout for small, fresh windslabs in alpine lee areas where recent winds will have blown the new snow into deeper pockets.

In the mid-pack, the Feb 3 persistent layer (crust/facet layer) remains a feature in the snowpack but has been unreactive with recent colder temperatures. This layer is a greater concern in thin snowpack areas

Weather Summary

An upslope flow overnight Thursday could bring up to 15 cm by mid morning on Friday. Amounts will vary with as little as a trace in some areas. Expect deeper amounts in eastern areas. Freezing levels will be 1500- 2000m.

Saturday and Sunday will be warmer with freezing levels 2000 - 2500m and continued flurries/showers.

For more detailed weather click here.

Terrain and Travel Advice

  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

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.