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Avalanche Forecast

Archived

Jan 19th, 2025–Jan 20th, 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.

The deep persistent problem has been removed from the forecast region due to the absence of recent avalanche activity. However, the layer remains in the snowpack and could re-emerge as a concern in the future. Wind could increase Tuesday in the high alpine.

Confidence

Moderate

Avalanche Summary

No avalanches were observed or reported in Little Yoho today.

Snowpack Summary

Wind slabs remain on lee features in the alpine. The upper pack may have a thin crust under the new snow on solar aspects and a surface hoar/facet interface under last week's snow, but no avalanches observed on this layer yet. The mid-pack is generally strong; however, a facet layer can be found near the ground in shallow snowpack areas. At treeline, average snowpack depth ranges from 120 to 150 cm.

Weather Summary

Generally clear weather is expected on Monday, with slightly warmer temperatures. Valley temperatures will be around -7°C, and ridge temperatures near -10°C. A slight temperature inversion is also possible. Winds at 3000m may increase into the strong range from the NW.

Terrain and Travel Advice

  • Wind slabs are most reactive during their formation.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected 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.