Avalanche Forecast
Issued: Jan 26th, 2023 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Persistent Slabs and Wind Slabs.
isnowsell,
Avalanche Canada
The danger rating may be decreasing, however, buried weak layers remain a primary concern. Avoid wind-loaded terrain, and rocky, shallow start zones.
Summary
Confidence
Moderate
Avalanche Summary
A widespread avalanche cycle occurred Wednesday, up to size 3. Both loose wet and wind slab releases have been reported. While it is suspected some of the avalanche activity likely stepped down to deeper weak layers.
Snowpack Summary
At higher elevations, above roughly 2000 m, new snow has been redistributed by strong southwest winds. At lower elevations expect to find a widespread rain crust on the surface or moist, saturated snow at low elevations that are still experiencing above-freezing temperatures.
A weak layer of surface hoar buried in early January is now down 70-100 cm. This layer is spotty in its distribution and is of greatest concern in sheltered and shaded openings at treeline.
Weak layers that were reactive over the Christmas and New Year's period have shown signs of bonding and gaining strength. These include a surface hoar layer buried on Dec 28 found 50 to 100 cm deep and a facet layer buried on Dec 23 found 70 to 120 cm deep.
Weather Summary
Thursday night
Cloudy with isolated flurries and trace accumulation. Treeline temperatures 0 to -5 C. Moderate northwest alpine winds. Freezing levels 1000 m.
Friday
Mostly sunny, with no precipitation. Treeline temperatures 0 to -5 C. Light north alpine winds. Freezing levels 500 m.
Saturday
Sunny, with no precipitation. Treeline temperatures -10 to -15 C. Light to moderate northeast alpine winds.
Sunday
Sunny, with no precipitation. Treeline temperatures -5 to -10 C. Light northeast alpine winds.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.
- Avalanche hazard may have improved, but be mindful that deep instabilities are still present.
Problems
Persistent Slabs
A series of storms have added a significant load to buried weak layers in the upper meter of the snowpack. The primary layer of concern is a layer of surface hoar now buried 30-50 cm deep, is primarily found inland and most concerning in sheltered and shaded open slopes around treeline.
The second layer is comprised of facets and/or surface hoar that was buried in late December. This layer is now down 70-120 cm. It has shown evidence of strengthening but remains on our radar.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Wind Slabs
At higher elevations (2000 m and above), where the recent precipitation fell as snow, strong southwest winds have formed windslabs on lee slopes and terrain features.
Aspects: North, North East, East, South East, North West.
Elevations: Alpine.
Likelihood
Expected Size
Valid until: Jan 27th, 2023 4:00PM
