Natural avalanche activity has slowed down. The consequences of triggering the basal facets are still high. Be mindful in route selection.
Weather Forecast
Tuesday is forecast to bring cloudy skies with light flurries in the afternoon, a temperature of -11c at 2300m and 70km/hr winds from the west are expected in the alpine. Wednesday is to bring 6 cm of snow, -8c and light NW winds.
Avalanche Summary
No new avalanches were observed today.
Snowpack Summary
The most recent snowfall left us with about 10cm of snow. This new snow overlies the Jan. 17 SH which is mostly found below tree line(below 2200m) and will be on our radar again when we get more snow. This new snow has been touched by the wind in the alpine in places but skies nicely once it becomes sheltered.We dug in a few different places today and got varying results. The thin areas are more reactive to test results on the basal facets than the deeper places. In the Commonwealth area today we dug a pit with a depth of 80cm and the bottom half was facets. That said, we have had a lot of wind on the slopes this winter, so it is challenging to know where the thin and deeper areas are. Triggering an avalanche from a thin spot has a high likelihood to spread across the slope.
Problems
Deep Persistent Slabs
Deep Persistent Slab avalanches are the release of a thick cohesive layer of hard snow (a slab), when the bond breaks between the slab and an underlying persistent weak layer deep in the snowpack. The most common persistent weak layers involved in deep, persistent slabs are depth hoar or facets surrounding a deeply buried crust. Deep Persistent Slabs are typically hard to trigger, are very destructive and dangerous due to the large mass of snow involved, and can persist for months once developed. They are often triggered from areas where the snow is shallow and weak, and are particularly difficult to forecast for and manage.
Wind Slabs
Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.