Fresh pockets of wind slab likely exist in the Alpine. New snow and wind will continue to add to the load over the early January surface hoar. Be cautious in wind-loaded terrain where this layer may be getting buried deep enough to produce large avalanches.
Gradual snow fall amounts of low density snow and increasing winds have likely formed fresh wind slabs in the alpine. Watch for these along ridge lines, lee areas and cross loaded features.
Expect renewed reactivity as wind and a bit of new snow add to the load on the Jan 3 surface hoar (5-10mm). This layer is buried ~40cm and will be most reactive at ridgeline or in open lee features, where wind has stiffened the surface. If triggered, this slab has the potential to step down to the deep persistent layer.
The Nov 17 layer, which consists of a faceted crust and decomposing surface hoar, highlights a weak basal snowpack. Be particularly cautious in steep, rocky areas with thin snow coverage, where the majority of the snowpack is weak and faceted.
Fresh pockets of wind slab in the alpine exist in some locations. Early Jan surface hoar layers are present in the upper 40cm.
The mid-pack facets are slowly rounding and gaining strength, while the basal facets and Nov 17 facet/SH/crust weakness are still reactive when isolated in snowpack tests.
Sunday will see mainly cloudy skies with 15-30km/hr Westerly winds. The alpine high will be -12 with the freezing level remaining at valley bottom as cooler temps settle in.
5cm for Monday into Tuesday with strong winds.
Frequent Flyer ran size 2.0 over the Connaught Valley skin track into the creek around noon on Saturday. The debris pile was ~1m deep and 10m wide.
A steady stream of size 1-1.5 skier-triggered avalanches have been reported over the last few days, likely failing on the Jan 3 surface hoar which is buried ~35cm.
