New snow will need some time to stabilize.
An increase in temperature and wind will be added more load to our buried weak layer.
Assess conditions while you travel. Watch and feel for signs of instability such as whumpfing, cracking, and recent avalanches.
Buried layers of surface hoar and facets have been reactive to human triggers in recent days. Reactivity has been observed in sheltered areas at treeline, where the surface hoar may be preserved, and in wind-loaded areas at upper elevations, where a cohesive slab has been formed above.
15 cm of new snow that fell Thursday night sits on a variety of surfaces that include a layer of low-density lighter snow. Warmer temperatures are expected to consolidate this new snow into a slab.
Small avalanches in the upper snowpack could trigger deeper weak layers, creating a larger-than-expected avalanche.
The new snow that fell Thursday night quickly formed a storm slab. This slab produced several avalanches up to size two that were triggered with explosives and ski cutting. Natural activity was also seen from this storm slab.
Thursday night brought us 15 cm of fresh snow. With warmer temperatures and more water in this snow, it will feel heavier than the snow we have been getting over the last week. That snow came with southwesterly winds and was redistributed, building wind slabs. Where the wind did not have an effect, the new heavier snow will be sitting on about 30 cm of lighter snow.
The middle of the snowpack consists of weak sugary layers of facets and surface hoar. A widespread rain crust remains near the ground, at treeline, and below treeline.
At treeline, snowpack depths vary from 120 to 200 cm.
Friday Night
Mainly cloudy, 5 cm accumulation, winds southwest 15 km/h, temperature -9 C at 1500 m.
Saturday
Cloudy, 8 cm accumulation, winds southwest 15 gusting to 25 km/h, temperature -5 C at 1500 m.
Sunday
Mainly cloudy, 10 cm accumulation from the night previous, possible rain during the day, winds south 20 to 30 km/h, temperature 0 C at 1500m.
Monday
Cloudy with sunny periods, trace accumulation, winds northeast 15 km/h, temperature -13 C at 1500 m.
More details can be found in the Mountain Weather Forecast.
