Storm slabs continue to accumulate over an unusually unstable layer. Avoid avalanche terrain during periods of heavy loading from new snow.
Fresh storm slabs continue to build over a weak layer. They have been reactive to riders and will increase in size and sensitivity with continued snowfall.
On Friday and Saturday, storm slab avalanches were reported size 1-2 on all aspects and elevations. They were triggered naturally, by skiers, vehicles and explosives. Some were triggered remotely or sympathetically. Slabs were up to 60 cm deep and ran on a crust or facet layer. Reactivity is expected to continue on Sunday.
Another 10 to 20 cm is forecast to fall over the day Sunday, bringing storm totals to 50 to 70 cm since Thursday night. Near ridgetops, strong southwest wind has likely loaded recent snow into leeward terrain features. At lower elevations, the storm snow may contain a thin crust from a brief temperature spike on Friday.
The recent snow is not bonding well to the underlying layer which may exist as a hard crust or weak, faceted grains.
The mid and lower snowpack is well-settled and dense with no other layers of concern.
Saturday night
Cloudy with 5 to 10 cm of snow. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -10 °C.
Sunday
Cloudy with 10 to 20 cm of snow. 20 to 30 km/h south ridgetop wind. Treeline temperatures -10 °C.
Monday
Cloudy with 5 to 10 cm of snow. 20 to 40 km/h southeast ridgetop wind. Treeline temperatures -11 °C.
Tuesday
A mix of sun and cloud. 20 to 40 km/h southeast ridgetop wind. Treeline temperatures -10 °C.
More details can be found in the Mountain Weather Forecast.
