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Archived

Avalanche Forecast

Feb 6th, 2020–Feb 7th, 2020
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
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
2: Moderate
The avalanche danger rating in the alpine will be moderate
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Human triggered avalanches are possible today, even likely in very steep unsupported terrain features!

Weather Forecast

Mainly cloudy today, no precipitation, moderate winds from the West, and the freezing level should stay below Valley Bottom. Flurries tonight, and light snow tomorrow with accumulations up to 10cm.

Snowpack Summary

Continued mod to strong winds have been producing soft slabs on immediate lees, and cross-loaded terrain features in the alp and exposed areas of TL. We have received 30cm+ of low-density new snow at treeline and above since the atmospheric river event last weekend. Expect dust on crust at lower elevations, and rugged travel.

Avalanche Summary

Yesterday in the Highway Corridor we observed 8 avalanches on very steep Nth facing terrain. One MIN from Grizzly Glades noted multiple loose dry avalanches to size 1. Tuesday's Helicopter control on Ross Peak Slide Path produced limited results to size 2.5, one slab failed at glacier ice for the second time this Winter.

Confidence

Due to the number and quality of field observations

Avalanche Problems

Storm Slabs

Incremental loading of new low-density snow and moderate to strong wind has formed storm slabs on immediate lees, and cross-loaded terrain features at all elevations.

  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2.5

Loose Dry

We now have enough low-density new snow for a loose dry avalanche problem. Practise your "sluff" management today, and be cognisant of terrain traps below you, or other parties above you.

  • Avoid terrain traps, such as gullies, where the consequences of a small avalanche could be serious.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2

Cornices

Cornices have grown significantly thanks to our Atmospheric River last weekend. The number of Cornice failures has declined in the last 48 hours but, they are still susceptible to failure and have the potential to trigger large avalanches.

  • Pay attention to overhead hazards like cornices; which could trigger large avalanches.
  • Minimize exposure to corniced features.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1.5 - 2.5