Conservative terrain choices will be your best tool to work the problem of uncertainty around buried weak layers.
A layer of surface hoar is buried 20 to 50 cm deep. If triggered, avalanches on this layer could step down to deeper weak layers.
A layer of weak facets near the ground may be reactive to human triggering, especially in shallow, rocky areas in alpine terrain where a crust cannot be found above the layer.
On Sunday, a skier was uninjured after accidentally triggering a size 2 deep persistent slab on basal facets over a smooth rock slab.
Ongoing explosive control work in recent days has consistently produced deep persistent slab avalanches, size 1.5 to 2.
Small amounts of new snow rests on old surfaces including surface hoar, facets, and crusts. Beneath lies a complex snowpack with several layers of concern.
The most prominent is a layer of surface hoar buried 20 to 50 cm deep. It is less of a concern in areas where a strong, supportive crust exists above this layer.
The mid to lower snowpack is typically characterized by sugary, facetted crystals and a basal crust.
Snowpack depths at treeline range from 50 to 130 cm.
Check out this blog post for some insight into the current shallow yet complex snowpack.
Tuesday Night
Mostly clear with some clouds, potential trace accumulation, ridgetop winds south 15 km/h, treeline temperature -7 °C.
Wednesday
Mix of sun and clouds, trace accumulation, ridgetop winds south 20 km/h, treeline temperature -6 °C.
Thursday
A mix of sun and cloud, 2 cm accumulation, ridgetop winds south-southwest 15 km/h, treeline temperature -7 °C.
Friday
Cloudy with late-day clearing, 2 cm accumulation, ridgetop winds southwest 10 km/h, treeline temperatures -8 °C.
More details can be found in the Mountain Weather Forecast.
