More avalanche activity and forecasted snow mean the hazard will rise- possibly quickly and dramatically. Watch conditions carefully and don't venture into big terrain.
Confidence
Moderate - Intensity of incoming weather systems is uncertain
Weather Forecast
A bit of a conflicting forecast right now (we look at 3 everyday). Winds will be anywhere from 45-100km/hr. Given today's experience we'd lean more towards the 70km/hr range at 2500m. Flurries will only bring a few more centimeters tonight and another 6-20 tomorrow. Alpine temperatures will be around -10 for the high.
Avalanche Summary
Several new slabs were seen in the northern reaches of our region today. It's hard to guess the age as they were blown in and reloaded quickly. They were all in the alpine and about sz2. While officially out of our forecast region, but still relevant, Cascade Falls in Banff was reported to have released today. Thinner areas appear to be touchier at the moment.
Snowpack Summary
Not a lot of snow last night. Some stations had a cm or 2, but nothing significant. What was interesting today was seeing, and feeling the wind arrive. Especially in the northern portion of the region. There are definitely new wind slabs in the alpine & treeline areas on N-S aspects. The first question to ask now is: How will the load shift and will this change initiate a natural cycle? We suspect it will in the alpine, but treeline will likely remain in the human triggering range only.
Problems
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.
Persistent Slabs
Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.