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Avalanche Forecast

Archived

Apr 24th, 2024–Apr 25th, 2024

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

Regions

Glacier.

Good quality riding can still be found on shaded polar aspects.

Expect challenging valley bottom travel and surface crust on solar aspects.

Confidence

High

Avalanche Summary

No new natural activity observed over the last few days.

On Monday, a field team in the Fidelity zone was able to ski-control several dry/loose sz 1 avalanches on N aspects, as well as ski-cut a wind slab on an E aspect.

Also Monday, a field team also was able to ski-control wet/loose avalanches to sz 2 on solar aspects steeper than 35°.

Snowpack Summary

Warm temps + solar effect have created surface crusts on all but polar aspects in the alpine. Expect 20 cm of dry snow and wind slabs at upper elevation on lee features. These slabs sit atop a series of crusts on all aspects except high north faces, where they overlie dry snow.

The Feb 3rd crust, down ~110cm, is the dominant mid-pack layer and still produces isolated planar results when tested.

Below tree-line, expect spring conditions. Travel is rough at lower elevations.

Weather Summary

Spring storms continue :), as unsettled conditions bring light to moderate precip through Sunday with snow at upper elevations.

Tonight: Cloudy/flurries, Trace snow, Alp low -5°C, Light SW ridge top winds

Thurs: Cloudy/flurries, Trace snow, Alp high 0°C, light W winds, 2000m FZL

Fri: Flurries, 10-15 cm, Alp high 1°C, light E winds, 2100m FZL

Sat: Flurries, 5-10 cm, Alp high 0°C, light ridge winds, 2100m FZL

Terrain and Travel Advice

  • Be especially cautious as you transition into wind affected terrain.
  • A crust on the surface will help bind the snow together, but may make for tough travel conditions.

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.