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Archived

Avalanche Forecast

Jan 16th, 2019–Jan 17th, 2019
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Little Yoho.

Things are improving but uncertainty remains with forecasters regarding the persistent slab problem. Remaining conservative in your decision making is still advised.

Weather Forecast

A weak system will track through the forecast region starting Thursday night, bringing up to 15cm of snow by the end of Saturday. Temperatures will remain on the warm side of seasonal. Alpine winds will increase late friday to the strong range from the SW.

Snowpack Summary

Solar crusts on some steep SE to West slopes at TL. Surface hoar development at treeline. In thick snowpack areas, the Dec 10th weak layer of facets is now down 100-150cm with a stronger snowpack below. In thin snowpack areas, there is little separation between Dec 10 and the weak depth hoar/ facets sitting 40 cm above the ground

Avalanche Summary

No avalanches observed or reported today.

Confidence

Intensity of incoming weather systems is uncertain on Saturday

Avalanche Problems

Persistent Slabs

In deeper snowpack locations the Dec 10 layer is a thin, separated, layer of facets about 120cm deep which is becoming less of a problem. In thinner areas however, Dec 10 is only about 80cm deep and has a thick, weak, facet layer siting just below.
Convex features and steep unsupported slopes will be most prone to triggering.Be aware of the potential for wide propagations which could result in large avalanches.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 2 - 3