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Archived

Avalanche Forecast

Dec 27th, 2019–Dec 28th, 2019
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
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: Glacier.

Triggering of large avalanches is still possible. Select your routes carefully.

Weather Forecast

Flurries of snow today and tonight with light W ridge top winds, freezing level below valley bottom and an alpine high of -11. Saturday and Sunday are looking similar with the freezing level rising to 1100m by Sunday.

Snowpack Summary

5-10cm HN24 fell on top of yesterdays SH and the 80 to 120cm that is now over the Dec 11th SH (5-12mm). Slabs have formed in the lees of ridge crests and a thin crust on steep solar aspects is now under the new snow. Early season crusts still persist in the lower snowpack.

Avalanche Summary

Natural activity was observed yesterday out of both N and S facing terrain to size 2.5. Several natural avalanches were observed from the steep, N-facing gullies on MacDonald the day before, all running to the top of their respective fans. No new avalanches reported from the backcountry.

Confidence

Due to the number of field observations

Avalanche Problems

Persistent Slabs

We are entering a period of lower probability of triggering a slab, but a high consequence if you do. A 100cm slab sits on well-preserved, large surface hoar. This is a recipe for HUMAN-TRIGGERED avalanches.

  • Use conservative route selection, stick to supported terrain features, avoid overhead hazards.
  • Be wary of slopes that did not previously avalanche.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3.5