Avalanche Forecast

Moderate

While natural avalanche activity has slowed down, the storm slab sitting over surface hoar remains primed for human triggering.

Natural loose dry avalanches up to size 2 reported on Saturday. Avalanche control at Rogers Pass on Fri night produced avalanches up to size 3 running full path.

Neighboring operations report that the Jan 7th/9th surface hoar is starting to become reactive as well but we have not seen activity on this layer in the park yet.

A surface slab of varying density can be found in most locations throughout the park producing easy & very easy results in snowpack testing. These slabs are 20-40cms thick and burry a weak layer of surface hoar, and/or sun crusts(on steep solar aspects).

Below this interface are firm, wind pressed surfaces in exposed areas and low density sugary snow in sheltered areas.

The Jan 7th layer is down 50-80cm, comprised of surface hoar and/or a thin crust on steep S aspects.

Arctic low moving our way bringing cold temps.

Tonight Cloudy with clear periods. No precipitation. Alpine low -18 °C. Ridge wind SE 25 km/h.

Mon A mix of sun & cloud. No precip. Alpine high -17. Ridge wind E 25.

Tues A mix of sun & cloud. No precip. Alpine high -19. Ridge wind E 25. Strong alpine temperature inversion.

Wednesday A mix of sun & cloud. No precip. Alpine high -19,

• Make conservative terrain choices and avoid overhead hazard.
• Be aware of the potential for remote triggering and large avalanches due to buried surface hoar.
• Storm slabs in motion may step down to deeper layers resulting in large avalanches.