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Archived

Avalanche Forecast

Feb 19th, 2020–Feb 20th, 2020
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Little Yoho.

We have phased out the deep persistent facets as a problem in this region due to the overall deeper snowpack and lack of recent deep avalanches. Watch for isolated thin areas where facets may be present. Excellent ski conditions overall.

Weather Forecast

A temperature inversion (warmer in the alpine, cooler in the valley bottoms) will start to break down Thursday with some increased winds in the alpine. Temperatures will be -7 in the alpine midday with no snow forecast in the next 24 hours.

Snowpack Summary

Continued settlement is slowly stabilizing any recently formed windslabs, which can still be triggered in steep, loaded areas in the alpine. Some sun crust formation on steep S and SW facing terrain. Overall the deep snowpack (observed as 3m+ in some areas) is strong in Little Yoho with no significant shear test results.

Avalanche Summary

No new avalanches were observed or reported Wednesday. Some very large cornice failures were observed on Wapta Peak Wednesday which did entrain all of the snow below from cliffs, but did not trigger the slopes below.

Confidence

Avalanche Problems

Wind Slabs

Increased winds Thursday may add to recently formed windslabs, which can still be triggered by people in steep leeward areas in the alpine. Cornices have grown very large in recent weeks, so watch your exposure to them carefully.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2.5