Moderate southerly winds have formed wind slabs that may remain reactive to human triggers on lee features at treeline and above.
Use ridges or ribs to avoid areas of wind loaded snow.
Moderate southerly winds have formed wind slabs that may remain reactive to human triggers on lee features at treeline and above.
Use ridges or ribs to avoid areas of wind loaded snow.
Cornices may be weak and reactive to human triggers. They create a significant falling hazard, and may produce large slab avalanches as they fall onto the slope below.
Cornice failures are more likely during hot and sunny weather.
Wednesday night: Cloudy with flurries; 5-15 cm (rain below around 800 m) / Moderate southeast wind / Low of -3 / Freezing level 1100 m.
Thursday: Cloudy with flurries; 3-10 cm (rain below around 1300 m) / Light south wind / High of 2 / Freezing level 1600 m.
Friday: Mix of sun and cloud / Light west wind / High of 3 / Freezing level 1800 m.
Saturday: Mix of sun and cloud / Light west wind / High of 4 / Freezing level 1900 m.
Skier and snowmobiler triggered storm slab avalanches up to size 2 were reported on Tuesday. North and easterly aspects that had been loaded by the wind at treeline and above were the most reactive. See MINs Here and Here.
We currently have very limited avalanche observation data from this region.
Please consider posting your observations to the Mountain Information Network (MIN). Photos of current conditions and avalanches are the most helpful.
5-15 cm of new snow Wednesday night will add to the 35-55 cm of recent snow. Moderate southerly winds have formed wind slabs that may remain reactive to human triggers on lee features at treeline and above.
The recent snow is sitting on a variety of hard snow surfaces, including crusts and wind scoured snow. Below this, there are several crusts in the upper snowpack, but they are unlikely to be a concern in most areas until the next significant warming event.
