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Archived

Avalanche Forecast

Feb 9th, 2020–Feb 10th, 2020
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
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: South Coast.

It is uncertain how well the recent storm snow bonds with the underlying crust. Slabs might still be sensitive to human triggers. Investigate the bond of the recent snow before committing to high consequence terrain.

Confidence

Moderate - Uncertainty is due to the limited number of field observations.

Weather Forecast

Sunday Night: Clear, light to moderate north wind, treeline high -6 C, freezing level 800 m.

Monday: Mostly sunny, light northwest wind, treeline high -3 C, freezing level 1300 m.

Tuesday: Mostly cloudy, moderate to strong northwest wind, treeline high 0 C, freezing level 1000 m.

Wednesday: Mix of sun and cloud, light northwest wind, treeline high 0 C, freezing level 900 m.

Avalanche Summary

A small skier triggered slab avalanche was reported on Saturday (see this MIN report).

No new avalanches were observed on Friday. 

A few small (size 1) avalanches were triggered by skiers on Thursday. 

Snowpack Summary

The recent storm snow adds up to 30-50 cm and sits on a thick rain crust. It is uncertain how well the snow bonds with the crust. Several observed avalanches released within the storm snow and some slid on the crust. The snowpack below the crust consists of moist to wet snow and is well settled. Snowpack depths are suspected to be in the range of 150-250 cm around the peaks of the north shore mountains (1400 m), tapering quickly with elevation to almost nothing below 1000 m.

Terrain and Travel

  • Don't be too cavalier with decision making, storm slabs may remain sensitive to human triggering.
  • A moist or wet snow surface, pinwheeling and natural avalanches are all indicators of a weakening snowpack.
  • Avoid terrain traps such as gullies and cliffs where the consequence of any avalanche could be serious.

Avalanche Problems

Storm Slabs

The recent storm snow adds up to 30-50 cm and sits on a crust. It is uncertain how well the recent storm snow bonds with the crust. Assess the bond of the storm snow to the crust before you commit to high consequence terrain. 

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5