Avalanche Forecast

Archived

Feb 5th, 2022–Feb 6th, 2022

Alpine

Natural avalanches possible, human triggered probable.

Treeline

Natural avalanches unlikely, human triggered possible.

Below Treeline

Natural avalanches unlikely.

Alpine

Natural avalanches possible, human triggered probable.

Treeline

Natural avalanches unlikely, human triggered possible.

Below Treeline

Natural avalanches unlikely.

Alpine

Natural avalanches unlikely, human triggered possible.

Treeline

Natural avalanches unlikely, human triggered possible.

Below Treeline

Natural avalanches unlikely.

Regions

Little Yoho.

Continue to monitor slab development at treeline and expect reactive slabs in the alpine.

Weather Forecast

Sunday will have a trace of snow in the AM then clearing skies, continued moderate gusting strong W winds, and freezing levels to 15000m. Up to 10cm Monday, with temperatures in the alpine slightly inverted which should drop by the afternoon. Alpine winds will spike to strong by Monday afternoon.

Snowpack Summary

Moderate winds continue to redistribute the 20-50 cm that has accumulated over the Jan 30 crust, surface hoar and wind effect. Hard slabs can be found in alpine. While slab development at treeline is only starting, these are more likely to overlay a sun crust or surface hoar or facets. Shallow snowpack areas remain weak and faceted.

Avalanche Summary

No avalanche observations from Little Yoho on Saturday.

Confidence

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.