A persistent weak layer remains the primary concern - stick to conservative terrain free from overhead hazard.
Watch for new and reactive wind slabs forming at upper elevations.
Storm snow and wind may have formed wind slabs at upper elevations. These slabs will be most reactive in lee areas by ridgetops, and could step-down to deeper weak layers.
Weak layers in the upper snowpack continue to be reactive and surprise riders with wide propagation. Recent large avalanches have involved the 3rd or 4th rider. Remote-triggering and large avalanches remain possible.
On Friday sluffing and small wind affected pockets remained reactive to rider traffic.
On Thursday, a large persistent slab avalanche was remotely triggered by a snowcat on an east facing treeline slope. Reports of persistent slab activity appear to be tapering, but these layers are reactive and have produced recent large avalanches.
Light snow accompanied by strong west wind has likely built small wind slabs treeline and above. Below this, a new surface hoar/surface crust layer has been buried.
In the top 100 cm of the snowpack, there are multiple concerning persistent weak layers of surface hoar and/or facets/crusts. The majority of the recent large and destructive avalanches occurred on well-preserved surface hoar in sheltered areas at treeline and below.
The remaining snowpack has no current layers of concern.
Saturday Night
Cloudy. 1 to 5 mm of precipitation as snow or rain at treeline. 60 km/h west ridgetop wind. Treeline temperature -1 °C. Freezing level 1900 m.
Sunday
Mostly cloudy. 1 to 3 cm of snow. 60 km/h west ridgetop wind. Treeline temperature -3 °C. Freezing level 1700 m.
Monday
Mix of sun and clouds. 2 to 5 cm of snow. 30 km/h west ridgetop wind. Treeline temperature -8 °C.
Tuesday
Mix of sun and clouds. 2 to 3 cm of snow. 20 km/h west ridgetop wind. Treeline temperature -10 °C.
More details can be found in the Mountain Weather Forecast.
