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Archived

Avalanche Forecast

Dec 15th, 2021–Dec 16th, 2021
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
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
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
4: High
The avalanche danger rating below treeline will be high

Regions: South Coast.

Shifting wind directions on Thursday may form fresh wind slabs on numerous aspects.

 Watch for newly formed and reactive wind slabs as you transition into wind affected terrain. 

Confidence

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

Weather Forecast

WEDNESDAY NIGHT: Cloudy / Light, southerly winds / Low of -3 C / Freezing level 500 m.

THURSDAY: Mix of sun and cloud / Moderate, northwesterly winds / High of 1 C / Freezing level 600 m.

FRIDAY: Increasing cloudiness / Light, westerly winds / High of -1 C / Freezing level 500 m.

SATURDAY: Snow/rain; 65-75 mm / Extreme, southwesterly winds / High of 3 C / Freezing level 1300 m.

Avalanche Summary

Small (size 1) rider triggered wind slabs were reported in this region on Monday.

Snowpack Summary

Shifting wind directions on Thursday may form fresh wind slabs on numerous aspects.

30-40 cm of recent snow has buried the early December crust layers. The snowpack is generally well-settled and strong below these layers. 

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Use ridges or ribs to avoid areas of wind loaded snow.
  • Avoid terrain traps where the consequence of any avalanche could be serious.

Avalanche Problems

Wind Slabs

Shifting wind directions on Thursday may form fresh wind slabs on numerous aspects.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2