Heightened avalanche conditions exist on wind-affected slopes where there could be deep deposits of new snow.
Ongoing snowfall and strong south wind may have formed wind slabs on lee terrain features. A layer of facets and a crust down 60 could result in larger slab avalanches.
Recent snowfall and southerly wind have grown cornices and made them more likely to fail.
No new avalanches were reported over the weekend (at the time of publishing), however, some wind slab avalanches may have occurred during the peak of the storm on Sunday.
Last week, several remotely triggered storm and wind slab avalanches were reported. They typically occurred between 2000 and 2300 m and on a variety of aspects. A layer of facets and/or a crust down around 60 cm is likely responsible. Check out this MIN report for an example of these avalanches.
The recent storm only delivered 5 to 15 cm of snow to this region, but strong southerly wind would have formed deeper and potentially reactive wind slabs on lee terrain features. This snow overlies a crust at treeline and below. In the alpine, this snow sits over a variety of layers including dry snow and wind slabs on north aspects and sun crusts and wind-pressed snow on south aspects.
A layer of facets and a crust from early April can be found down up to 60 cm at treeline and above.
The base of the snowpack remains faceted and weak. Avalanche activity has not been observed on this layer recently, but concern remains for shallow rocky snowpack areas.
Sunday night
Scattered flurries with 5 cm of snow, 30 to 40 km/h southwest wind, treeline temperatures drop to -12 °C.
Monday
Clear periods in the morning, then increasing cloud in the afternoon, no significant precipitation, 20 km/h south wind, treeline temperatures warm to -6 °C.
Tuesday2 to 4 cm of new snow overnight then mix of sun and cloud during the day, 20 km/h southwest wind, treeline temperatures around -5 °C.
WednesdayMix of sun and cloud, isolated flurries with trace amounts of snow, 20 km/h south wind, treeline temperatures around -4 °C.
More details can be found in the Mountain Weather Forecast.
