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Avalanche Forecast

Archived

Mar 30th, 2025–Mar 31st, 2025

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

Regions

Kootenay Boundary, Bonnington, Grohman, Kootenay Pass, Norns, Rossland, Ymir, Crawford, Moyie, St. Mary, Kokanee.

Surface conditions and recent precipitation amounts are variable. Verify conditions as you travel.

Back off steep slopes if you find moist surface snow and no supportive crust.

Confidence

Moderate

Avalanche Summary

On Saturday and Sunday, numerous small wet loose avalanches were reported across the region. Similar activity is expected to continue with pulses of new snow, fluctuating freezing levels, and periods of sun.

Snowpack Summary

New snow has buried a melt-freeze crust of variable thickness that increases in supportiveness as you gain elevation. Below this crust, snow remains moist in the upper snowpack.

Weak layers in the middle and lower snowpack remain a concern for human-triggering, where a hard melt-freeze crust has not yet formed or breaks down during periods of sun or rising freezing levels.

Weather Summary

Sunday Night

Cloudy, flurries, 2 to 3 cm. 30 to 35 km/h southeast ridgetop wind. Treeline temperature -5 °Ç.

Monday

Cloudy. Flurries, 3 to 6 cm. 10 to 20 km/h southwest wind. Treeline temperature 0 °C. Freezing level 1700 m.

Tuesday

Cloudy, isolated flurries, 2 to 3 cm. 20 to 30 km/h northwest ridgetop wind. Treeline temperature 0 °C. Freezing level 1700 m.

Wednesday

Mainly cloudy, isolated flurries, 2 to 4 cm. 20 to 30 km/h northwest wind. Treeline temperature -3 °C. Freezing level 1700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Back off slopes as the surface becomes moist or wet with rising temperatures.
  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.