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Archived

Avalanche Forecast

Mar 13th, 2022–Mar 14th, 2022
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Little Yoho.

Increasing wind and more snow on the way will create fresh wind slabs in the alpine and possibly into tree line on Monday.

Weather Forecast

A slow but steady stream of precipitation is expected between Sunday evening and Wednesday morning. Up to 25cm is expected throughout that period. Also, the wind is expected to be strong from the West on Monday. Temperatures will generally be seasonal, with valleys warming to zero in the afternoons and the high alpine ridges remaining about -10.

Snowpack Summary

15-30cm of very low density snow over a buried sun crust on steep solar aspects. Very little wind or wind effect observed today. Feb 16 sun crust down 30-40 cm on steep solar aspects. Jan 30 sun crust or facet interface down 50-80 cm. The lower snow pack is generally well settled with typical weak facets found in shallow areas.

Avalanche Summary

A large avalanche was heard near theTakakkaw Falls study plot above above the Iceline trail in Little Yoho this afternoon. Both ski areas reported very small windslabs less than size 1 in immediate alpine lee areas. No other avalanches were observed or reported.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Monday

Avalanche Problems

Wind Slabs

Up to 20cm of low density snow is available for transport. The winds is expected to increase Sunday night into Monday to the strong range from the West. The wind is expected to redistribute the available snow creating fresh wind slabs on Monday.

  • Watch for surface cracking and stiffer surface layers of snow. Avoid wind loaded terrain.

Aspects: North, North East, East, South East.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

Buried crust/facet layers exist in the upper snowpack on steep solar aspects and have resulted in a few large avalanches over the past week. These persistent layers can be tricky to assess so use caution on slopes where they are present.

  • Dig down to find and test weak layers before committing to a line.

Aspects: South East, South, South West, West.

Elevations: All elevations.

Likelihood: Unlikely

Expected Size: 1.5 - 3