Avoid slopes that have corniced ridgelines. Cornice failure may trigger large, persistent slab avalanches on the slope below.
As temperatures rise, large cornice falls will become a concern. They can potentially trigger persistent slab avalanches on the slopes below. Evidence of recent cornice falls has been reported in the region.
Facets and/or surface hoar buried 40 to 80 cm deep are most prominent on north-facing slopes in the alpine. Avoid areas with a thin or variable snowpack.
On Monday, a 2.5 persistent slab avalanche was observed at Hudson Bay Mountain on a northeast alpine slope, likely triggered by a cornice fall. Evidence of last week's avalanche cycle continues to be reported.
Higher north-facing slopes remain suspect for triggering persistent slabs, especially with heavy loads or in areas with variable snowpack depth. Where a thick, supportive surface crust is found, triggering avalanches on buried weak layers is unlikely.
Tuesday Night
Partly cloudy. 15 to 30 km/h northwest ridgetop wind. Treeline temperature -6 °C. Freezing level at valley bottom.
Wednesday
Mix of sun and cloud. 20 to 40 km/h northwest ridgetop wind. Treeline temperature -2°C. Freezing level 1500 m.
Thursday
Mix of sun and cloud. 10 to 25 km/h west ridgetop wind. Treeline temperature -1 °C. Freezing level 1500 m.
Friday
Mix of sun and cloud. 20 to 40 km/h southwest ridgetop wind. Treeline temperature +2 °C. Freezing level 2000 m.
More details can be found in the Mountain Weather Forecast.
