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Avalanche Forecast

Archived

Apr 19th, 2019–Apr 20th, 2019

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

Regions

Sea To Sky.

Plan your travels to avoid steep leeward slopes where wind slabs may remain as well as steep southerly slopes during daytime warming.

Confidence

High -

Weather Forecast

FRIDAY NIGHT: Clear skies, light northeast wind, alpine temperature -4 C, freezing level 1600 m.

SATURDAY: Clear skies, light north wind, alpine temperature -3 C, freezing level 1800 m.

SUNDAY: Mix of sun and clouds, light southwest wind, alpine temperature -2 C, freezing level 2000 m.

MONDAY: Cloudy with alpine flurries, accumulation 5 cm, moderate southwest wind, alpine temperature -2 C, freezing level 2000 m.

Avalanche Summary

A loose wet avalanche and cornice cycle occurred in the region during the storm on Thursday night and Friday, producing small to large avalanches (size 1 and 2). Most of the avalanches occurred in the alpine as well as treeline.

Snowpack Summary

Around 20 to 30 cm of recent snow has accumulated above around 2000 m. The snow fell with strong south wind, likely forming new wind slabs and cornices in the alpine. The snowpack below treeline is saturated and rapidly melting.

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.