Avalanche forecast

North Columbia

Feb 10 – 11, 2020Avalanche Canada
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Avalanche danger

Wed
Thu
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
1 · Low

Highlights

Broken skies with little precipitation along with winds switching direction will keep wind slabs at upper elevations the main concern.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2

    Recent snowfall combined with elevated and shifting winds built wind slabs. Be mindful of areas where wind slab and cornice distribution overlap.

Confidence

High - Confidence is due to a stable weather pattern with little change expected.

Weather Forecast

Sunday Night: Cloudy with clear periods. Light to moderate northwest wind. Alpine high temperatures around -10.

Monday: Cloudy with sunny breaks. Light northwest wind. Alpine high temperatures around -6.

Tuesday: Scattered flurries. Light to moderate west wind. Alpine high temperatures around -5.

Wednesday: Mix of sun and cloud. Light to moderate west wind. Alpine high temperatures around -8.

Avalanche Summary

Reports from Saturday show numerous loose dry avalanche size 1-1.5 running in steep terrain in the alpine and at tree line. There were also a few skier and rider along with naturally triggered storm and wind slab avalanches size 1-1.5.

Thursday and Friday's reports showed loose dry size 1-1.5 avalanches running naturally from steep slopes facing the sun and a few small (size 1) wind slabs triggered with ski cutting and skier traffic on steeper rolls and ridgetop features.

Snowpack Summary

30-60 cm of snow from the last week now overlies older wind-affected snow at high elevations, with about half this amount instead overlying a widespread melt-freeze or rain crust to a variable upper extent of 1700-2400 metres in elevation. 

The mid and lower snowpack are generally well settled and strong. Although isolated, there are two deeper weak layers that may persist in some areas. A weak layer of surface hoar buried 90 to 170 cm deep may be found across the north of the region while a facet/crust layer from November may be found near the ground in shallower snowpack areas.

Terrain and Travel

  • Avoid freshly wind loaded features, especially near ridge crests, roll-overs and in steep terrain.
  • Seek out sheltered terrain where new snow hasn't been wind-affected.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

Regions covered