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Archived

Avalanche Forecast

Feb 12th, 2021–Feb 13th, 2021
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
1: Low
The avalanche danger rating in the alpine will be low
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
1: Low
The avalanche danger rating in the alpine will be low
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.

Overall things are looking pretty good in the Little Yoho region, however with the increased in winds on Saturday we may see some small natural activity in steep terrain and have kept the alpine hazard slightly elevated as a result.

Weather Forecast

Temperatures will rise slightly again on Saturday with highs at treeline of between -12 to -16 C. Skies will remain clear and sunny. Alpine winds will increase to the Moderate range out of the NE on Saturday afternoon which will still make it feel very cold in exposed areas so watch for frostbite!

Snowpack Summary

Previous winds from all directions have created wind slabs in some lee areas of the alpine, and wind effect in many open alpine and treeline areas. In sheltered areas the surface snow is facetting quickly and beginning to sluff more easily in steep terrain. A buried thin sun crust and facet layer from Jan 27th is present on steep south aspects.

Avalanche Summary

Following an increase in winds Thursday night several natural small thin wind slabs, and small loose dry avalanches, were observed on Friday. No recent large slab avalanches have been observed in the Little Yoho region.

Confidence

Wind speed and direction is uncertain on Saturday

Avalanche Problems

Wind Slabs

Wind slabs formed from variable alpine winds are still a concern, but are becoming more difficult to trigger with the cold temperatures. Watch for slabs over weaker facets or crusts. Several cornice failures have also been observed recently.

  • Use caution in lee areas. Recent wind loading has created wind slabs.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2

Loose Dry

As the surface snow facets and weakens, it is starting to sluff more easily in steep terrain. Higher wind speeds will also contribute to more natural sluffing. This is mostly a problem in narrow confined terrain like gullies or couloirs.

  • On steep slopes, pull over periodically or cut into a new line to manage sluffing.
  • Be careful of loose dry power sluffing in steep terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5