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Avalanche Forecast

Archived

Jan 8th, 2025–Jan 9th, 2025

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Glacier.

Use caution in wind effected terrain, a fresh wind slab has formed in the new snow.

If the skies are clear, watch for solar triggered loose avalanches in steep terrain facing the sun.

Confidence

Low

Avalanche Summary

No new natural avalanches were observed on Wednesday.

Solar triggered, loose, dry avalanches are likely on Thursday, if the skies clear.

On Monday, we observed a size 1.5 wind slab avalanche in the alpine above NRC gully on Macdonald West Shoulder, likely rider triggered.

Snowpack Summary

10-15 cm of new snow buried a weak interface which consists of widespread surface hoar present in the elevation band from ~1400 m to 2100 m surface hoar and a thin sun crust on steep westerly aspect. Moderate southerly winds have redistributed this new snow in exposed terrain, loading north facing terrain.

Isolated wind slabs are buried by new snow. These can be found on all aspects in the alpine.

Overall the mid and lower snowpack is strong and well settled.

Weather Summary

A brief clearing trend if forecast for Thursday, with a frontal system approaching Friday.

Tonight Cloudy w/clear periods. Alp Low -9, Ridge wind light gusting to mod. Freezing level (FZL) 700m.

Thurs Cloudy w/sunny periods. Alp high -4. Ridge wind SW 20 km/h. FZL 1100m.

Fri Flurries. 10-15 cm. Wind SW25, gusting to 50. FZL 800m

Sat Cloudy w/flurries. Trace precip. Alpine high -9 °C. Ridge wind W 15-35. FZL 800m.

Terrain and Travel Advice

  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks, or recent avalanches.
  • Avoid areas where the snow feels stiff and/or slabby.
  • Small avalanches can have serious consequences in extreme terrain. Carefully evaluate your line for slabs before you commit to it.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.