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Archived

Avalanche Forecast

Feb 12th, 2019–Feb 13th, 2019
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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
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
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Jasper.

Good skiing can still be found in sheltered locations, but be cautious if traveling in shallow snowpack areas.

Weather Forecast

A weak ridge builds Wednesday, giving stable weather for the next couple days. Spin-off from a Low impacting the south coast will give cloud and flurries on Friday.Wednesday: Mostly sunny. Light winds. Alpine temps Low -20C, High -12C.A detailed mountain weather forecast is available from Avalanche Canada.

Snowpack Summary

Ongoing cold temps have weakened the structure of the upper snowpack. There is no longer a slab over the persistent weakness sitting down 30-40cm (surface hoar, crusts, and/or facets). The basal snowpack is structurally weak in shallow areas, consisting primarily of facets/depth hoar (cold temps continue to develop this deep persistent weakness).

Avalanche Summary

Several loose dry avalanches up to size 2 have been naturally triggered in the facetting snowpack in steep shallow areas over the past 2-3 days. On Feb 7th, a size 2 deep persistent slab was triggered by skiers in the Maligne area on a W aspect, 1950m, on a 30 degree slope (see MIN).

Confidence

Avalanche Problems

Loose Dry

Cold temperatures continue to weaken the surface snow. Expect sluffing out of steep rocky terrain.
Be cautious with gully features.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Deep Persistent Slabs

This problem is still present and could be triggered from shallow snowpack areas. See MIN report.
Be cautious in shallow snowpack areas where triggering is more likely.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible

Expected Size: 1.5 - 3.5