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Avalanche Forecast

Mar 27th, 2024–Mar 28th, 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
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
1: Low
The avalanche danger rating at treeline will be low
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.

New snow may not bond well to old crusts.

If you see greater than 20 cm of new snow, the danger rating is one step higher.

Confidence

Moderate

Avalanche Summary

Several small wet loose avalanches occurred on Tuesday out of steep slopes in the afternoon sun.

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

Snowpack Summary

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

A layer of surface hoar is buried 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 places where it may still be possible to trigger this layer.

However, when a thick surface crust is present, human triggering this layer is unlikely.

Weather Summary

Wednesday Night

Cloudy with 5 to 10 cm of snow. 15 to 25 km/h south ridgetop wind.  Treeline temperature -4 °C.

Thursday

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

Friday

Mostly cloudy with 5 to 10 cm of snow. 20 km/h south ridgetop wind.  Treeline temperature -4 °C. Freezing level 1700 m.

Saturday

Mostly clear skies with up to 2 cm of snow. 10 km/h north ridgetop wind.  Treeline temperature -4 °C. Freezing level 1800 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Investigate the bond of the recent snow before committing to your line.
  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.

Avalanche Problems

Storm Slabs

Storm slabs will be most reactive where they are locally deeper because of wind loading.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2