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Archived

Avalanche Forecast

Dec 28th, 2018–Dec 29th, 2018
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.

Watch for windslabs developing with the storm tomorrow. Avalanches could step down into midpack weaknesses creating larger than expected events. Avoid avalanche terrain for a while again.

Weather Forecast

Moderate snow and strong winds are forecast for Saturday. This is likely to create new windslabs near ridgecrests.

Snowpack Summary

In most of Little Yoho there is 60-80 cm of settled snow over top of the Dec10 surface hoar/facet layer. Shears on this layer are generally producing hard but sudden planar results. In shallow areas (lower elevations and Mt. Dennis) the main concern is the weak basal facets which continue to produce whumphing and easy test results.

Avalanche Summary

No new avalanches observed or reported today in Little Yoho.

Confidence

Intensity of incoming weather systems is uncertain

Avalanche Problems

Persistent Slabs

This problem is a slab overlying the Dec 10 surface hoar/facet layer which is down 40-80 cm. Although this layer is gaining strength, there is still uncertainty with this interface. Evaluate this layer carefully prior to committing to bigger slopes.
Use caution on open slopes and convex rolls at treeline where buried surface hoar may be preserved.Use caution in lee areas. Recent wind loading has created wind slabs.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1 - 3