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Avalanche Forecast

Archived

Mar 29th, 2023–Mar 30th, 2023

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

Kootenay Boundary, Bonnington, Grohman, Kootenay Pass, Norns, Rossland, South Okanagan, Ymir, Moyie.

It will likely still be warm with a mix of sun and cloud on Thursday. If the sun stays out for an extended time think about an increase in the likelihood of loose wet avalanches running in steep terrain facing the sun.

Confidence

High

Avalanche Summary

On Wednesday there were several reports of wet loose avalanches running to size 1.5 in steep terrain facing the sun.

Snowpack Summary

There is likely a surface crust or moist snow on all aspects except north. On high northerly slopes, new snow from last week may overlie facets and surface hoar to mountain tops.

The mid-pack is generally well-settled.

The lower snowpack includes a layer of weak sugary facets near the ground. No recent avalanches have been reported on this layer. However, we continue to track the layer and watch for any signs of it becoming active again.

Weather Summary

Wednesday Night

Clear with cloudy periods. Light northeast wind. High of -7 °C at treeline. Freezing level at valley bottom.

Thursday

Mix of sun and cloud. Light northeast wind. High of 1 °C at treeline. Freezing level at 1900m.

Friday

Mostly cloudy with scattered flurries. Light southwest wind. High of -3 °C at treeline. Freezing level 1400m.

Saturday

Cloudy with flurries. Light southwest wind. High of -4 °C at treeline. Freezing level at 1300m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • As surface loses cohesion due to melting, loose wet avalanches become common in steeper 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.