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Avalanche Forecast

Archived

Apr 6th, 2025–Apr 7th, 2025

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 possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
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.

Regions

Kootenay Boundary, Bonnington, Grohman, Kootenay Pass, Norns, Rossland, Ymir, Kokanee.

Expect changing conditions as you gain elevation

Wet avalanches are a concern with low elevation rain, while storm snow accumulating at higher elevations may be sensitive to human triggers

Confidence

Moderate

Avalanche Summary

On Saturday, small wet loose activity was produced by the sun and rider traffic.

Looking forward, we expect avalanche activity to be possible in rain saturated terrain, but likely at elevations that receive new snow.

Snowpack Summary

A mix of wet snow and rain will fall over a wet upper snowpack or a crust at high elevations. Terrain below 1800 m will receive mostly rain.

The upper snowpack is wet with several softening crusts. Several weak layers from early March, mid-February, and late January can be found in the mid and lower snowpack.

The remainder of the snowpack is generally well settled.

Weather Summary

Sunday Night

Cloudy. 30 to 50 km/h south ridgetop wind. Treeline temperature +8 °C. Freezing level remains above 2300 m.

Monday

Cloudy with 10 to 20 cm of wet snow or rain. 20 to 40 km/h southwest ridgetop wind. Treeline temperature +1 °C. Freezing level lowers to 2000 m over the day.

Tuesday

Another 10 to 20 cm of snow is possible overnight above 1500 m.

Cloudy with 5 cm of new snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level around 1800 m.

Wednesday

Cloudy with flurries. 10 to 20 km/h southwest ridgetop wind. Treeline temperature 0 °C. Freezing level around 2000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for fresh storm slabs building throughout the day.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.