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Archived

Avalanche Forecast

Jan 24th, 2020–Jan 25th, 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
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
3: Considerable
The avalanche danger rating at treeline will be considerable
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
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.

The snowpack is recovering from the latest input of moist snow and rain. Be cautious around steep, convex terrain and freshly loaded features.

Confidence

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

Weather Forecast

FRIDAY NIGHT: Wet flurries, 5-10 cm. Alpine low temperature 0 C. South wind, 25-45 km/hr. Freezing level 1200 m.

SATURDAY: Wet flurries, 10 cm. Alpine high temperature +2 C. Southeast wind 25-45 km/hr. Freezing level 1400 m.

SUNDAY: Snow and rain, 20-30 cm. Alpine low temperature 0 C. South wind 35-55 km/hr. Freezing level 1500 m.

MONDAY: Flurries, up to 10 cm. Alpine low temperature -1 C. Southwest wind 20 gusting to 45 km/hr. Freezing level 1200 m.

Avalanche Summary

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

Snowpack Summary

Wet snow has accumulated at higher elevations and where dry snow prevailed (at the highest elevations), winds have scoured and redistributed the new snow developing slabs and building cornices. Rain and warm temperatures have promoted settlement in the upper snowpack and moist surface snow up to 1900 m. At lower elevations, rain saturated the snowpack.

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

  • Avoid terrain traps such as gullies and cliffs where the consequence of any avalanche could be serious.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.

Avalanche Problems

Storm Slabs

Storm slabs developed at higher elevations where recent snow accumulated and stayed cold. At lower elevations rain saturated the snowpack, however loose wet avalanches may still be triggered in steep and extreme terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2