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Archived

Avalanche Forecast

Mar 26th, 2024–Mar 27th, 2024
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Bonnington, Crawford, Grohman, Kokanee, Kootenay Pass, Moyie, Norns, Retallack, St. Mary, Valhalla, Ymir.

Use extra caution as you venture into wind-affected terrain.

Recent storm snow may not have bonded yet to the underlying surface.

Confidence

Moderate

Avalanche Summary

Several large (size 2) skier-accidental and skier-controlled storm slab avalanches occurred on Monday east of New Denver.

Small dry loose avalanches have been occurring on the crust as well.

Snowpack Summary

15 to 25 cm of recent snow overlies predominantly crusty surfaces, except for northerly aspects at upper elevations.

A weak layer of surface hoar is down 30-60 cm in isolated, sheltered areas at treeline.

A widespread crust with sugary facets above is buried 80-180 cm deep. Steep or convex terrain features with a shallow or thin to thick snowpack at treeline and above are the most likely places to trigger this layer. However, when a thick surface crust is present, human triggering this layer is unlikely.

Weather Summary

Tuesday Night

Mostly cloudy with up to 5 cm of snow. 15 km/h west alpine wind. Treeline temperature -5 °C. Freezing level 1800 m.

Wednesday

Cloudy with up to 5 cm of snow. 15 to 25 km/h south alpine wind.  Treeline temperature -4 °C. Freezing level 1200 m.

Thursday

Mostly cloudy with up to 15 cm of snow. 20 km/h southwest alpine wind.  Treeline temperature -4 °C. Freezing level 1700 m.

Friday

Mostly cloudy with up to 5 cm of snow. 20 km/h southwest alpine wind.  Treeline temperature -4 °C. Freezing level 1700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Cornice failure may trigger large avalanches.

Avalanche Problems

Wind Slabs

Wind has come from a variety of directions. Wind slab could be found on all aspects.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2

Persistent Slabs

A crust with weak facets above is buried 80 to 180 cm deep. Steep or convex terrain features with a shallow or thin to thick snowpack at treeline and above are the most likely places to trigger this layer.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3.5