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Avalanche Forecast

Archived

Jan 26th, 2025–Jan 27th, 2025

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

Regions

Glacier.

Small loose avalanches can have big consequences near terrain traps.

Be prepared to manage your slough in the steeps and watch for solar triggered slides above you.

Confidence

Moderate

Avalanche Summary

A few small natural loose avalanches were observed from steep, south facing paths in the highway corridor today.

Field teams have observed skier triggered size 1's the past few days, which were isolated to the top 10-15cm of snow on old firm bed surfaces. Despite their small size, they were moving fast in steep terrain.

Snowpack Summary

A thin surface crust has formed on steep solar aspects.

Variable wind slabs that formed on the 23rd are decomposing with the cold, clear nights. Sheltered areas have ~15cm of low density, faceted (sugary) snow atop a denser, wind-pressed layer. The Jan 7th layer is down 30-60cm, comprised of surface hoar (all aspects) and/or a thin crust on steep S aspects. The mid and lower snowpack are well bonded and strong.

Weather Summary

A strong ridge of high pressure is firmly planted. This means mainly clear skies and no precipitation for the foreseeable future.

Tonight Clear periods. Ridge wind W 10 km/h. Alp low -6C°. Freezing level (FZL) at valley bottom. Strong alpine temp inversion.

Mon Sun & cloud. Alp high 1 C°. Ridge wind: NW 15 km/hr. FZL 1000m. Strong alpine temp inversion

Tues Mainly sunny. Alpine high 1°C. Wind west 15-25km/h. FZL 1800m

Tuesday

Terrain and Travel Advice

  • Be careful with sluffing in steep terrain, especially above cliffs and terrain traps.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks, or recent avalanches.

Problems

Loose Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.

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.