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Avalanche Forecast

Archived

Mar 31st, 2022–Apr 1st, 2022

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

Regions

Glacier.

T'is the season to travel early!

Danger rises with daytime warming, especially when direct sun is striking the slopes and softening the crust.

Cold, wintry snow can be found in Alpine polar aspects, along with wind slabs and large cornices.

Weather Forecast

Convective flurries with daytime warming raising freezing levels, then night-time cooling.

Tonight: Cloud, isolated flurries, trace-5cm, Alp low -8*C. FZL 900m, Light/mod W winds.

Fri: Cloud, flurries, trace-5cm, Alp high -5*C, FZL 1600m, light/mod SW winds

Sat: Cloud, flurries, trace-5cm, Alp high -5*C, FZL 1500m, light/mod SW winds

Snowpack Summary

20-25cm of new snow fell at Treeline in the last 24hrs, burying a variety of surfaces including wind slabs, solar crusts, and a melt/freeze crust to 2200m. The cool nights will form a surface crust below Treeline, softening with daytime warming. N'ly slopes in the Alpine hold cold, wintery snow. Late season cornices are LARGE!

Avalanche Summary

No new avalanches observed on Wed/Thurs with the cooler temps. The widespread natural avalanche cycle from Mon/Tues was driven primarily by strong solar input on SE through to W aspects, especially at lower elevations. Wet slabs, deep persistent slabs, glides, and loose wets were gouging to ground, breaking trees, and running full path.

Confidence

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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.

Cornices

Cornice Fall is the release of an overhanging mass of snow that forms as the wind moves snow over a sharp terrain feature, such as a ridge, and deposits snow on the downwind (leeward) side. Cornices range in size from small wind drifts of soft snow to large overhangs of hard snow that are 30 feet (10 meters) or taller. They can break off the terrain suddenly and pull back onto the ridge top and catch people by surprise even on the flat ground above the slope. Even small cornices can have enough mass to be destructive and deadly. Cornice Fall can entrain loose surface snow or trigger slab avalanches.