Avalanche Forecast
Issued: Mar 26th, 2024 4:00PM
The alpine rating is , the treeline rating is , and the below treeline rating is Known problems include Persistent Slabs.
mhalik,
Avalanche Canada
Carefully evaluate bigger terrain features before committing to them.Human triggering remains a concern with buried persistent weak layers.
Summary
Confidence
Avalanche Summary
Monday, a few glide slab avalanches were observed in the Iskut area.
Sunday, several loose wet avalanches were observed on steep sunny slopes, ranging from small to large (size 1 to 2).
Saturday, three very large (size 3) persistent slab avalanches were observed in the north of the region. They occurred on south-facing alpine slopes and were likely triggered by daytime warming.
Snowpack Summary
A skiff of new snow may overlie a thick widespread crust. At lower elevations, the crust may soften with warming during the day or the snowpack may be may be isothermal.Dry powder snow still exists on high north-facing alpine slopes and a weak layer of surface hoar is developing in sheltered terrain at treeline and above.
Various weak layers, including crusts, facets, and/or surface hoar exist approximately 40 to 80 cm deep. An additional crust and facet layer may be found 100 to 150+ cm below the surface. Lingering concern remains for human-triggering on these persistent weak layers.
Weather Summary
Tuesday Night
Mostly cloudy with 0 to 4 cm of new snow. 20 km/h southwest ridgetop wind. Treeline temperature drops to around -3°C.
Wednesday
A mix of sun and cloud. 20 km/h east ridgetop wind. Treeline temperature around 1 °C. Freezing level rising to 1400 m.
Thursday
Partly cloudy. 20 km/h east ridgetop wind. Treeline temperature around 0 °C. Freezing level rising to 1200 m.
Friday
Partly cloudy. 10 km/h west ridgetop wind. Treeline temperature around 0 °C. Freezing level rising to 1100 m.
More details can be found in the Mountain Weather Forecast.
Terrain and Travel Advice
- When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.
- Avoid thin areas like rock outcroppings where you're most likely to trigger avalanches failing on deep weak layers.
- Keep in mind that human triggering potential persists as natural avalanching tapers off.
Problems
Persistent Slabs
Avoid shallow or variable depth snowpacks in the alpine and treeline where triggering a persistent weak layer is more likely.
Aspects: All aspects.
Elevations: Alpine, Treeline.
Likelihood
Expected Size
Valid until: Mar 27th, 2024 4:00PM
