High freezing levels and new precipitation are keeping the danger elevated.
New and reactive wind slabs may be building above the rain line.
New wind slabs will be forming above the rain line in areas that recieve enough new snow and wind. Use extra caution in lee areas near ridgetops. Avoid travelling on or below cornices where possible.
High freezing levels and rain below 2000 m will create a wet snow surface and the potential for wet loose sluffing. Use appropriate sluff management techniques.
A natural cycle of wet loose avalanches has occurred over the past several days, generally in the size 1 range, with isolated cases up to size 3 reported.
On Saturday, a very large cornice broke off and triggered a subsequent slab on a north-facing alpine slope.
With continued high freezing levels and moderate precipitation in the forecast, we may see avalanche conditions become more reactive on Monday.
5 to 15 mm of rain may fall below 2000 m overnight and through Monday. Above the rain line, new snow will likely be forming reactive new wind slabs on lee north through easterly slopes.
Below the rain line, a melt-freeze crust caps the snowpack, which may melt, turning the surface wet or moist, and creating the potential for wet loose sluffing.
Crusts from late March are buried 10 to 80 cm deep, elevation and aspect dependent.
The mid and lower snowpack is well settled and strong with no additional layers of concern.
Sunday Night
Mostly cloudy. 10 km/h west ridgetop wind. Treeline temperature 1 °C. Freezing level 2200 m dropping to 2000 m.
Monday
Cloudy. 2 to 15 mm of precipitation as snow or rain at treeline. 30 km/h west ridgetop wind. Treeline temperature 0 °C. Freezing level 2000 m.
Tuesday
Mostly cloudy. 5 to 15 cm of snow. 40 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1700 m.
Wednesday
Mostly cloudy. 5 to 20 cm of snow. 30 km/h southwest ridgetop wind. Treeline temperature -5 °C. Freezing level 1500 m.
More details can be found in the Mountain Weather Forecast.
