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Archived

Avalanche Forecast

Mar 20th, 2015–Mar 21st, 2015
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
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
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: Little Yoho.

The new snow has improved ski conditions at treeline and above. Watch for increasing hazard as wind slabs develop on specific terrain features and keep an eye on cornice development over the weekend. Travel remains a bit rugged at lower elevations.

Weather Forecast

Light snow and mild temperatures with moderate SW winds are forecast through Saturday. Sunday we expect a mix of sun and cloud with cooler temperatures. Monday and beyond look unsettled with occasional light precipitation.

Snowpack Summary

5-10cm of new snow on Friday with moderate SW winds. Wind slabs up to 35cm deep are present in immediate lee areas of the alpine. The mid pack and base of the snowpack are well settled and well bonded overall. Surface crusts and/or moist snow exist below 1900m.

Avalanche Summary

Several skier triggered small wind slabs in immediate lee features were reported by the local ski areas on Friday. We expect this problem to increase slightly over the weekend.

Confidence

Intensity of incoming weather systems is uncertain on Saturday

Avalanche Problems

Wind Slabs

New wind slabs are starting to become more sensitive to human triggering on lee features in the alpine. This will continue to increase through the weekend given the current forecast. Cornices will also be a concern with the new snow and wind.

  • Watch for whumpfing, hollow sounds, and shooting cracks.
  • Use caution in lee areas. Recent wind loading have created wind slabs.

Aspects: North, North East, East, South East, South.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2