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Archived

Avalanche Forecast

Apr 6th, 2024–Apr 7th, 2024
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
Alpine
1: Low
The avalanche danger rating in the alpine will be low
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
Alpine
1: Low
The avalanche danger rating in the alpine will be low
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 Boundary, Kootenay Pass, Moyie, Norns, Retallack, Rossland, South Okanagan, St. Mary, Valhalla, Ymir.

Wind slabs, formed by northerly winds, can be found on lee features in the alpine and may not bond well to a recently formed crust. Use caution as you transition into wind-affected areas.

Confidence

High

Avalanche Summary

No new avalanches were reported.

Isolated wind slabs may be possible to human-trigger. The most likely terrain is directly lee of high spots and ridge features.

Even short windows of sun may be enough to develop moist surface snow that may produce wet loose avalanche activity.

Snowpack Summary

Roughly 20 cm of new snow has accumulated over a melt-freeze crust on all aspects and elevations. A second crust formed in late March can also be found in the upper snowpack at variable depths depending on aspect and elevation.

A persistent weak layer of facets sits on top of a second buried crust down 80 to 180 cm. This layer is unlikely to be human-triggered in areas where a thick crust above the weak layer is present.

Weather Summary

Saturday Night

Cloudy with flurries, 6 to 8 cm. 20 to 25 km/h west ridgetop wind. Treeline temperature -4° C

Sunday

Mainly cloudy with isolated flurries, 1 to 2 cm. 15 to 20 km/h northwest ridgetop wind. Treeline temperature -2° C. Freezing level 1800 m.

Monday

Mostly clear skies, increasing cloud overnight with flurries 2 to 5 cm, 20 to 30 km/h southwest wind. Treeline temperature -2° C. Freezing level 1900 m.

Tuesday

Cloudy in the morning with scattered flurries tapering in the afternoon, 2 to 4 cm. 30 to 40 km/h southwest wind. Treeline temperature 0° C. Freezing level 2000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Wind slabs may be poorly bonded to the underlying crust.
  • Carefully evaluate steep lines for wind slabs.

Avalanche Problems

Wind Slabs

New snow and variable winds have built wind slabs in immediate lee features in the alpine.

Aspects: East, South East, South, South West, West.

Elevations: Alpine.

Likelihood: Unlikely

Expected Size: 1 - 1.5