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Avalanche Forecast

Archived

Apr 4th, 2026–Apr 5th, 2026

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 possible, human triggered probable.
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.

Regions

Glacier.

A dramatic rise in temperature will weaken cornices in the alpine and cause wet avalanches at lower elevations.

Confidence

Moderate

  • We are confident that there are weak cornices, but uncertain about how likely they are to trigger.
  • We are uncertain due to variable freezing levels.

Avalanche Summary

No notable natural avalanches have been observed over the last few days in Glacier park. See MIN report for small, human triggered wind slab on Wednesday.

Near neighbours have been reporting cornice failures this week, both natural and explosive triggered.

A widespread, natural avalanche cycle occurred up to size 4.0 on Mar 19-20 during the atmospheric river. Check out pics from this exceptional avalanche cycle in the MIN Reports.

Snowpack Summary

A widespread sun crust can be found near the surface on solar aspects. Sheltered polar alpine terrain holds dry, loose snow sitting over a firm crust. Wind slabs might be lingering in exposed terrain.

Large cornices can found on ridgetops.

A series of crusts formed in March are present down 50-150 cm.

Travel can be challenging below treeline with frozen tree bombs and huge avalanche debris from the mid-March atmospheric river.

Weather Summary

Rising freezing levels.

Tonight Clear periods. Alpine low -3°C. Ridge wind light gusting to 35km/h. Freezing level (FZL) 800m

Sun Mix of sun and cloud. No precipitation. Alp High 3°C. Wind S 10-20km/h. FZL 2400m

Mon Sun and cloud with isolated showers. Trace precipitation. Alp High 5°C. Wind S 20 gusting to 65. FZL 2600m

Tues Cloudy, scattered flurries, 4cm. High 0°C. Wind W 15gusting to 75km/h. FZL 1900m

Terrain and Travel Advice

  • Avoid travelling on slopes below cornices.
  • Loose avalanches may start small, but they can grow and push you into dangerous terrain.
  • Be careful as you transition into wind-affected terrain.

Problems

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.

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.