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Archived

Avalanche Forecast

Jan 6th, 2021–Jan 7th, 2021
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
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
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

Regions: Jasper.

Winds have moderated but expect wind slabs have developed at tree line and above. Although natural avalanche activity has decreased, conservative terrain selection is advised and assess every slope.

Weather Forecast

Thursday will be clouds and sun, no new snow, -7C and light SW winds. Friday will be similar with 10-20km/hr SW winds. Saturday will be slightly cooler but very similar to previous days. No new snow is expected for the next 5 days. 

Snowpack Summary

40cm of new snow from Sunday is being redistributed by SW winds mainly at exposed ridge-tops. This new snow overlies a sporadically distributed surface hoar and facet layer down 40-70cm. The mid-pack is supportive except in shallow locations. The bottom is weak facets and depth hoar.

Avalanche Summary

No patrol on Wednesday and nothing reported. Tuesday's Hilda patrol had no new. Sunday-Monday, after the 40cm storm, several large avalanches were observed in the alpine. Sunday's explosive control had varied results with some several size 3 wind slabs. Some stepped down. Make your observations count by using Mountain Information Network.

Confidence

Due to the number of field observations

Avalanche Problems

Wind Slabs

Consistent strong SW winds continue to form wind slabs treeline and above. They appear to be stubborn but be vigilant.

  • If triggered the storm/wind slabs may step down to deeper layers resulting in large avalanches.
  • Use caution in lee areas. Recent wind loading has created reactive slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2.5

Persistent Slabs

Use caution around thin to thick areas where buried weak layers could be triggered.

  • Dig down to find and test weak layers before committing to a line.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood: Possible

Expected Size: 1 - 3

Deep Persistent Slabs

  • Pay attention to overhead hazards like cornices which could easily trigger the deep persistent slab.
  • Avoid thin, rocky or unsupported slopes.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3