6:30 AM update: New storm slabs may be forming with up to 20 cm of snow overnight. Assess for slabs before entering consequential terrain.
With up to 20 cm of new snow, assess for slab development before committing to high-consequence terrain. Be careful with wind-loaded pockets, especially near ridge crests and rollovers, where human-triggering is most likely.
No new avalanches were reported, but observations remain limited.
Snow pinwheels were observed on steep treeline features on Saturday due to rain and warm temperatures near Iago Peak.
If you are heading into the backcountry, please consider sharing your observations via the Mountain Information Network.
Up to 20 cm of overnight snow is found at treeline and above, while rain has saturated the snowpack at lower elevations.
This overlies a variety of surfaces, including a crust on south-facing aspects and wind-affected snow on north-facing terrain.
The mid-December crust is 150 to 250 cm deep. This crust is 30 cm thick and well-bonded to the snow above.
In general, the snowpack is well settled and right-side up.
Sunday Night
Cloudy. 10 to 15 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1000 m.
Monday
Cloudy. Up to 5 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -6 °C.
Tuesday
Cloudy. 25 to 40 cm of snow. 60 km/h southwest ridgetop wind. Treeline temperature -4 °C.
Wednesday
Cloudy. 5 to 10 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -5 °C.
More details can be found in the Mountain Weather Forecast.
