New snow and strong southerly winds will build reactive storm slabs on Monday.
Storm slabs have the potential to step down and trigger large, destructive avalanches.
A buried layer of facets in the snowpack is expected to be more reactive in wind-affected thin rocky terrain features. Triggering of this layer is less likely where a supportive crust is present above.
Moderate to heavy precipitation and strong southerly winds will build reactive storm slabs on Monday.
No new avalanches have been reported in the past few days.
If you head out in the backcountry, let us know what you're seeing by submitting a MIN report.
By Monday morning, up to 25 cm of new snow will have fallen, covering surface hoar and faceted snow from recent cold temperatures. A crust exists beneath the new snow up to 1500 m.
Below this, a layer of facets from early February and a thick crust from late January are at a similar depth between 80 and 120 cm below the snow surface. These layers remain possible to trigger with large loads and are most likely to be found on north-facing slopes.
Sunday Night
Cloudy. 15 to 25 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -6 °C.
Monday
Cloudy. 10 to 20 cm of snow. 60 km/h southwest ridgetop wind. Treeline temperature -1 °C.
Tuesday
Mostly cloudy. 15 to 20 mm of precipitation as snow or rain at treeline. 50 km/h southwest ridgetop wind. Treeline temperature -1 °C.
Wednesday
Mix of sun and clouds. 1 to 4 cm of snow. 50 km/h southwest ridgetop wind. Treeline temperature -2 °C.
More details can be found in the Mountain Weather Forecast.
