Recent snow and wind have likely formed reactive slabs and may bond poorly to old surfaces. Assess and verify conditions as you travel.
In wind exposed areas, avalanches will be more likely on leeward slopes. In sheltered areas, the likelihood of avalanches will depend on how a potentially weak layer of facets or surface hoar reacts to the new load.
No new avalanches have been reported.
Early season observations are very limited. Please consider sharing your observations with forecasters and the backcountry community through the Mountain Information Network.
20 to 30 cm of recent snow and moderate southwest winds are likely forming reactive windslabs in leeward terrain.
In the alpine and exposed areas at treeline, this new snow covers hard, wind-affected surfaces. In lower elevation sheltered trees, it sits over weak surface hoar and facets.
The remainder of the snowpack is generally strong, with some crusts near the base.
Snow depths vary significantly across the region, with about 50 cm at treeline and up to 100 cm in alpine areas.
Monday night
Cloudy with up to 5 cm of snow. 30 to 50 km/h south ridgetop wind. Treeline temperature -7°C, temperature inversion with -5°C above 1800 m.
Tuesday
Cloudy with 3 to 7 cm of snow. 40 to 60 km/h south ridgetop wind. Treeline temperature -7°C, temperature inversion with -3°C above 1800 m.
Wednesday
Mostly cloudy with 2 to 5 cm of snow. 60 to 80 km/h ridgetop wind. Treeline high 2 °C.
Thursday
Mostly cloudy with 5 to 10 cm of snow. 40 to 70 km/h ridgetop wind. Treeline high 1°C.
More details can be found in the Mountain Weather Forecast.
