Very large persistent slab avalanches remain likely to human trigger, especially at treeline and above.
Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
A crust with weak facets above is down 80 to 200 cm. Steep or convex terrain features with a shallow or thin to thick snowpack at treeline and above are the most likely places to trigger this layer.
If triggered loose wet avalanches may step down to deeper layers, resulting in very large avalanches.
Numerous naturally triggered loose wet avalanches were reported on sunny aspects at all elevations on Monday.
Additionally, one naturally triggered size 2 wet slab on an east aspect below treeline and one size 2 cornice failure were also reported.
A weak surface crust forming overnight will break down quickly throughout the day.
Cornices have become large and looming, and are more likely to fail during periods of warming.
A widespread, hard crust down 80-200 cm with weak facets above continues to be the primary layer of concern for human triggering of very large persistent slab avalanches.
Tuesday Night
Partly cloudy. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1700 m.
Wednesday
Mix of sun and cloud. 30 to 40 km/h southwest ridgetop wind. Treeline temperature 4 °C. Freezing level 2500 m.
Thursday
Cloudy with flurries, 10 to 20 cm of snow (above 1200m). 30 to 40 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 1500 m.
Friday
Cloudy with isolated flurries, 0 to 3 cm of snow. 5 to 10 km/h south ridgetop wind. Treeline temperature -10 °C. Freezing level 800 m.
More details can be found in the Mountain Weather Forecast.
