Wind slabs exist near ridge-tops. They have been small in size but should be treated with respect, especially in gully features.
The late Dec layer of surface hoar, facets or sun crust is buried 40-60cm throughout the region and producing variable results depending on location and what crystal form is present. There is still high uncertainty as to how reactive this layer is.
In the past week we have seen several avalanches initiate or step down to this deep persistent layer. Conservative terrain choice is your best defence as this problem is almost impossible to forecast.
Deep persistent slabs are best managed by:
Cornices are best managed by:
Cooler daytime highs are in the forecast tomorrow. Alpine temperatures will cool to -13 by midday. Winds will also be light to moderate from the W/SW and only light flurries along the divide. Winds will pick up again for Sunday and more light snow.
Recent wind slabs can be found near ridge-tops. There is 40-60 cm above the Dec 31 layer of facets, surface hoar and sun crust which is slowly becoming less reactive. The bottom layer of the snow-pack consists of weak facets and depth hoar, except for deeper snow-pack areas (over 2m) which have basal facets but not as prevalent.
A ginormous natural avalanche over Cascade waterfall occurred today which went on the basal facets/depth hoar. There is some speculation that the warmer temperatures may have played a factor but its anyone's guess! Some other smaller persistent slabs as well were reported in the lake Louise backcountry in the last 24 hours.