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Avalanche Forecast

Archived

Jan 16th, 2019–Jan 17th, 2019

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

North Columbia.

Watch for wind affected slopes in the alpine and at treeline. Snowfalls, increasing winds and rising freezing level starting Friday will likely change the avalanche conditions for the weekend.

Confidence

High -

Weather Forecast

WEDNESDAY NIGHT: Cloudy with clear periods, light to moderate southeast winds, alpine temperature -4 C to -8 C, freezing level at valley bottom.THURSDAY: Increasing cloudiness with scattered flurries, light winds from southeast, alpine temperature -2 C to -6 C, freezing level up to 900 m.FRIDAY: Mainly cloudy with flurries, snow accumulation of 5 cm, moderate winds from southwest, alpine temperature -4 C, freezing level around 1200 m.SATURDAY: Mainly cloudy with flurries, snow accumulation of 5 cm, moderate to strong southwest winds, alpine temperature -3 C to -7 C, freezing level up to 1300 m.

Avalanche Summary

No new significant avalanche activity was observed on Monday and Tuesday.

Snowpack Summary

Following warm and sunny weather at higher elevation, moist snow on solar aspects has turn into a crust with temperature cooling. The snow has remained dry on north aspects slopes.  Wind slabs are still lingering in lee and cross-loaded features in alpine and exposed treeline terrain but they are old and hard to trigger.The middle and lower portions of the snowpack are generally well-settled and strong.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.