Forecast snow and wind are expected to form fresh storm slabs reactive to human triggers.
Watch for rapidly changing conditions during periods of heavy loading from new snow and wind.
Several persistent weak layers exist in the upper metre of the snowpack. Small avalanches in motion may trigger these deeper layers creating very large and destructive avalanches.
Forecast snow and wind are expected to form fresh storm slabs reactive to human triggers.
On Wednesday, a couple cornice failures triggered persistent slabs up to size 2.5 at treeline and above.
Forecast snow and wind are expected to form fresh storm slabs reactive to human triggers.
Concern remains for triggering persistent slab avalanches. These layers include:
Facets/surface hoar/crust from early March buried 40-70 cm.
Facets/surface hoar/crust from mid-February buried 60-100 cm
Facets/surface hoar/crust from late January buried 100-160 cm.
The lower snowpack is well settled and strong.
Thursday night
Cloudy with 5 to 15 cm of snow. 20 to 30 km/h south ridgetop winds. Treeline temperature -6 °C. Freezing level 1200 m.
Friday
Cloudy with 10 to 20 cm of snow. 20 to 30 km/h southwest ridgetop winds. Treeline temperature -4 °C. Freezing level 1600 m.
Saturday
Mix of sun and cloud. 10 to 20 km/h west winds. Treeline temperature -4 °C. Freezing level 1500 m.
Sunday
Mostly cloudy with 5 to 15 cm snow. 10 to 20 km/h south ridgetop winds. Treeline temperature -3 °C. Freezing level 1500 m.
More details can be found in the Mountain Weather Forecast.
