Be aware that a low rating does not rule out all avalanche potential. Keep the head up and still watch for localized instabilities.
Weather Forecast
The cooling will continue for the next while. Overnight alpine lows will hit -13. Tomorrow's high will be -14. We will see some flurries as well, but amounts will be insignificant. Winds will come around to the NE and average 30km/hr at ridge line.
Avalanche Summary
A few small, isolated loose dry out of steep terrain. There was also a large natural cornice triggered avalanche above three isle lake within the past few days. This supports the large trigger idea when it comes to the deeper layers.
Snowpack Summary
Up to 5cm's fell last night in convective flurries with very little wind. The winds did pick up in the afternoon, which blew some alpine ridges clean. There is likely a few isolated storm slabs in immediate lees, but they'll be small. Aside form that not much change. A snow survey flight today had a much weaker snowpack in the southern area of the Park. The further north we moved, the better it seemed. Snow depths at treeline were about 170cm's.
Problems
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.
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.