Make conservative terrain choices and give the storm snow time to heal. There is some uncertainty in the intensity of Saturday's weather and how the snowpack will handle it.
Several buried weak layers remain a concern for human triggering. At treeline elevations, the main concern is surface hoar and crust layers in the middle of the snowpack, especially on steep convex openings. In the alpine, the main concern is weak facets at the bottom of the snowpack, especially on rocky slopes with variable snow depths.
Rider triggerable storm slabs could increase in size and sensitivity throughout the day.
Be aware that storm slab avalanches could step down to deeper layers resulting in a larger and more destructive avalanche.
No new avalanches were reported in the past few days in the region but observations are limited.
If you are out in the backcountry please consider filling out a Mountain Information Network report.
As a cold front passes over the region new snow will add to the storm slab problem. At lower elevations, a rain crust exists down 30cm, with reported elevations extending up roughly 1200 m.
Snowpack depths are shallower than normal, and several buried weak layers have been a concern over the past few weeks. One is a recently buried surface hoar layer found up to 60cm deep in sheltered terrain features at treeline and above. At this same depth, a crust exists on steep south facing slopes. Another layer of facets, crust, and surface hoar was buried around Christmas and is now up to 80cm cm deep. Finally, a layer of large, weak facets buried in November is found near the bottom of the snowpack. This layer is likely most problematic in alpine terrain, where shallower avalanches could scrub down to these basal facets.
Recent observations suggest the buried weak layers are gaining strength, but not enough to trust them in high consequence terrain.
Friday Night
Stormy with 5 to 10cm of new snow expected. Strong southwest winds and a low of -3 at 1500m.
Saturday
Stormy with up to 15cm of new snow. Strong southwest winds shifting to moderate northwest and a high of -3 at 1500m.
Sunday
A mix of sun and cloud with light flurries bringing trace amounts of new snow. Moderate westerly winds and a high of -6 at 1500m.
Monday
Stormy with up to 15cm of new snow expected. Strong northwest winds and a high of -3 at 1500m.
More details can be found in the Mountain Weather Forecast.
