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Avalanche Forecast

Archived

Mar 28th, 2022–Mar 29th, 2022

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.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Northwest Inland.

Keep an eye on the snow surface, as it gets moist from warming the size and likelihood of wet loose avalanches will increase.

Confidence

Moderate - The snowpack structure is generally well understood.

Weather Forecast

Monday night: No new snow expected. Possibility of mild temperature inversion, 1 at 1500 m. Light southwest winds.

Tuesday: Cloudy with no new snow expected. Southerly winds increasing throughout the day to strong in the evening. Freezing levels rising to 1600 m.

Wednesday: Mostly cloudy with light flurries bringing trace amounts of new snow. Moderate southwest winds. Freezing level rising to 1300 m.

Thursday: A mix of sun and cloud with the possibility of light flurries bringing trace amounts of new snow. Moderate west winds and freezing level around 1300 m.

Avalanche Summary

On Sunday ski cutting produced one size one wind slab avalanche on a northwest aspect at 1700 m. This avalanche ran on the late March crust mentioned in the snowpack summary.

Snowpack Summary

A supportive crust extends into the alpine on all aspects. This crust will likely become moist as the freezing level rises. Wind slabs may be found at high elevations on north and east aspects.

Large overhanging cornices have been observed in the region. Best practice is to limit your time under these hazards.

A couple of layers of weak crystals in the upper snowpack appear to be bonding according to recent snowpack tests. Additionally, we suspect that the surface crust will help bridge these layers, further decreasing their likelihood of triggering.

Terrain and Travel

  • As surface loses cohesion due to melting, loose wet avalanches become common in steeper terrain.
  • Use extra caution around cornices: they are large, fragile, and can trigger slabs on slopes below.

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.