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Avalanche Forecast

Archived

Apr 23rd, 2025–Apr 24th, 2025

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

Regions

Glacier.

Solar triggered dry loose sluffing is possible with rising freezing levels.

Use caution in steep terrain for rider triggered sluffing and lingering storm slabs.

Confidence

Moderate

Avalanche Summary

No new natural activity was observed on Wednesday.

On Tuesday, riders triggered dry loose sluffing in steep east facing terrain in the alpine.

Neighbouring operations reported natural cornice falls on Tues.

Natural storm slabs in extreme terrain up to size 2 were observed from Monday afternoon.

Soft, surface storm slabs were reactive to ski cuts on steep slopes in the Mt Fidelity area at treeline on Monday. These were size 1.5 were running far due to the crusty bed surface.

Snowpack Summary

~15 cm of storm snow fell early in the week above 1600. Below this new snow a crust is present on solar slopes in the alpine and on all aspects below 2200m. This crust has been a bed surface this week for small loose dry and storm slab avalanches. Both of these problems have been human and naturally triggered.

Rising freezing levels will rapidly deteriorate the upper snowpack as spring conditions return to treeline and into the alpine.

Expect variable conditions below treeline.

Weather Summary

A ridge of high pressure maintains clear skies with rising freezing levels later in the week.

Tonight Clear with cloudy periods. Alp Low: -2 deg C. Wind E 10 km/h. Freezing Level (FZL) 1300m.

Thurs Sunny with cloudy periods. Alp high +3 deg C. Wind SE 15 km/h. FZL 2500m.

Fri Sunny. Alp high +7. Wind SE 10-20 km/h. FZL 2800m.

Sat A mix of sun and cloud w/isolated showers. Alp high 0 deg C. Wind Light. FZL 2900m.

Terrain and Travel Advice

  • Be alert to conditions that change with elevation and sun exposure.
  • Travel early on sun-exposed slopes before cornices weaken with daytime warming.
  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.

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.

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.