Cornices growth during the storm was extensive.
Give slopes threatened by cornices a wide berth and keep well back from the edge when travelling along ridges.
Overhanging cornices remain possible to trigger naturally. Give slopes threatened by cornices a wide berth and keep well back from ridges, human triggering is likely and may trigger isolated storm slabs at upper elevations.
A weak layer of buried surface hoar and facets is worst at treeline in areas sheltered from previous strong south and west wind. Triggering of this layer is unlikely if a supportive surface crust is present.
On Monday, numerous wet loose avalanches were reported up to size two in the Duffy Lake area.
Two explosives controlled size 3 avalanches were reported that may have released down to an early November weak layer.
A significant rain and warming event has saturated the upper snowpack up to 2300 m.
Clear overnight skies and dropping freezing levels have likely started to form a surface crust. Below this the snowpack remains moist.
The mid pack is settling rapidly and increases in resistance.
The lower snowpack is well consolidated snow and two melt-freeze crusts from early season.
Tuesday Night
Clear skies. 40 km/h southwest ridgetop wind. Treeline temperature 3 °C. Freezing level 3200 m.
Wednesday
Mix of sun and clouds. 1 mm of rain at treeline. 30 km/h southwest ridgetop wind. Treeline temperature 1 °C. Freezing level 2000 m.
Thursday
Sunny. 10 km/h west ridgetop wind. Treeline temperature -1 °C. Freezing level 1900 m.
Friday
Sunny. 10 km/h southeast ridgetop wind. Treeline temperature 2 °C. Freezing level 3100 m.
More details can be found in the Mountain Weather Forecast.
