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Avalanche Forecast

Archived

Apr 1st, 2023–Apr 2nd, 2023

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

Regions

Glacier.

New snow will not bond well to previous surfaces of solar crusts and well settled powder from the recent high pressure, expect reactivity in steep start zones.

Glide cracks continue to open up and fail sporadically as large slab avalanches, minimize exposure to these unpredictable features.

Confidence

Moderate

Avalanche Summary

Saturday, there were a few naturally triggered loose dry avalanches from the steep terrain in the Eastern highway corridor.

Glide cracks have been on the move recently, giving isolated large avalanches this week from steep south facing terrain. There was a size 3 just West of the park on Friday, and a few size 2.5-3.5 from Mt Tupper earlier in the week.

Snowpack Summary

New snow (5-15cm at time of writing) is covering a solid crusts on solar aspects, and 5-10cm of settled old powder on polar aspects.

The mid and lower snowpack is generally strong. However, the basal weakness of rounding facets/decomposing crust can be found near the ground in many locations, and will remain worthy of consideration until the end of the season.

Weather Summary

Unstable air in the wake of Saturdays cold front will give ongoing convective flurries into next week.

Tonight: Flurries (5cm). Alpine Low -11°C. Moderate SW ridgetop winds.

Sun: Flurries (5-10cm). High -8°C. Freezing level(FZL) 1200m. Light W wind.

Mon: Flurries (10cm). Low -10°C, High -7°C. FZL 1500m.

Tues: Flurries (10cm), FZL 1300m.

Terrain and Travel Advice

  • Avoid freshly wind loaded features, especially near ridge crests, roll-overs and in steep terrain.
  • Even a small avalanche can be harmful if it pushes you into an obstacle or a terrain trap.

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.

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.