Avalanche Forecast

Moderate - Uncertainty is due to how buried persistent weak layers will react with the forecast incoming weather.

TUESDAY NIGHT: Cloudy with light snowfall, accumulation 5 to 10 cm, moderate southwest wind, alpine temperature -7 C.

WEDNESDAY: Morning snowfall then cloudy, accumulation 5 to 10 cm, moderate west wind, alpine temperature -8 C, freezing level rising to 1100 m.

THURSDAY: Cloudy with light snowfall, accumulation 2 to 5 cm, light to moderate southwest wind, alpine temperature -6 C, freezing level rising to 1500 m.

FRIDAY: Morning snowfall then a mix of sun and cloud, accumulation 2 to 5 cm, light southwest wind, alpine temperature -5 C, freezing level 1500 m.

Many small (size 1 to 1.5) storm slab avalanches were triggered by skiers on Monday. They occurred at all elevation bands and generally on northwest to east aspects. They were commonly 20 to 30 cm deep and released on the surface hoar layer described in the Snowpack Summary.

Around 20 to 40 cm of snow overlies a widespread layer of surface hoar that was reported to be between 10 and 20 mm in size and at all elevations. This same layer of surface hoar has been reported as sitting on a thin melt-freeze crust on sun-exposed aspects, which is a particularly nasty combination. The new snow will likely become increasingly reactive to human triggers as it stacks up and settles into a cohesive slab.

The early-February melt-freeze crust down 50-100 cm is dormant but should be monitored. The remainder of the mid and lower snowpack is generally well settled and strong.

• Stick to simple terrain or small features with limited consequence.
• Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
• Avoid terrain traps such as gullies and cliffs where the consequence of any avalanche could be serious.
• Be aware of the potential for large avalanches due to the presence of buried surface hoar.