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Archived

Avalanche Forecast

Jan 25th, 2020–Jan 26th, 2020
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
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
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

Regions: South Coast.

Avalanche hazard will increase through the day where heavy snow accumulates.

Confidence

Moderate - Uncertainty is due to difficult to forecast freezing levels.

Weather Forecast

SATURDAY NIGHT: Wet flurries, 5-10 cm. Alpine low temperature +1 C. Southeast wind 20 gusting to 50 km/hr. Freezing level 1200 m.

SUNDAY: Snow and rain, 25-35 cm. Alpine high temperature +2 C. South wind 35-55 km/hr. Freezing level 1400 m.

MONDAY: Scattered flurries, 5 cm. Alpine high temperature +1 C. South wind 20 gusting to 45 km/hr. Freezing level 1200 m.

TUESDAY: Mix of sun and cloud. Alpine high temperature +1 C. South wind 15-25 km/hr. Freezing level 1300 m.

Avalanche Summary

A few small (size 1) wet-loose avalanches were observed on Thursday morning as the rain event began.

Snowpack Summary

Recent warm temperatures and rain saturated the snowpack to 1900 m. Where dry snow prevailed (at the highest elevations), winds have scoured and redistributed about 20 cm new snow developing slabs and building cornices. 

Rain earlier in the week created a strong and settled snowpack, which is now 250-300 cm deep around the peaks of the North Shore mountains.

Terrain and Travel

  • Minimize exposure during periods of heavy loading from new snow and wind.
  • Avoid terrain traps such as gullies and cliffs where the consequence of any avalanche could be serious.
  • As surface loses cohesion due to melting, loose wet avalanches become common in steeper terrain.

Avalanche Problems

Storm Slabs

Thick storm slabs will form as heavy snowfall accumulates.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Loose Wet

Rain and warm temperatures will encourage wet-loose avalanches in steep terrain at lower elevations.

Aspects: All aspects.

Elevations: Treeline, Below Treeline.

Likelihood: Possible

Expected Size: 1 - 2