Be mindful a buried weak layer may persist within range of human triggering.
A layer of surface hoar is buried 60 to 100 cm deep. This layer may be triggerable by riders at upper elevations where it is not bridged by a thick overlying crust.
Solar-triggered loose wet avalanches were reported in the warm weather on Saturday, mostly size 1 but up to size 2.
Explosive control work near Revelstoke on Saturday produced cornice and near-surface slab avalanches size 1.5-2.5.
A couple of natural wind slabs size 1-2 and a persistent slab size 1.5 have been reported out of steep, unsupported alpine features in the last couple of days.
5-15 cm of new snow sits over a crust at elevations and aspects that saw above-zero temperatures and sun on Saturday.
The mid snowpack contains a couple of layers of note; a hard crust formed by an early December rain event around 60 cm deep and a layer of surface hoar 60 to 100 cm deep. Where it exists, the crust effectively bridges underlying weak layers, but the surface hoar remains a concern in areas that do not have the overlying crust.
The lower snowpack is variable throughout the region; in shallower snowpack areas, basal facets may exist.
Sunday night
Mostly cloudy with a trace of new snow, ridgetop wind <15 km/h west, treeline temperature -3 °C.
Monday
A mix of sun and cloud, ridgetop wind 20-30 km/h southwest, treeline temperature -2 °C.
Tuesday
A mix of sun and cloud, ridgetop wind 20-30 km/h southeast, treeline temperature -3 °C.
Wednesday
Sunny, ridgetop wind 20-30 km/h variable, treeline temperature -2 °C.
More details can be found in the Mountain Weather Forecast.
