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Archived

Avalanche Forecast

Feb 26th, 2012–Feb 27th, 2012
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: South Coast.

Confidence

Good

Weather Forecast

Monday: A mostly sunny day, with moderate northerly winds and temperatures reaching -5. Tuesday & Wednesday: Expect clouds to build, with light snow developing late Tuesday and tapering into Wednesday afternoon. Winds should turn southerly but remain light with temperatures reaching -5 in the afternoons.

Avalanche Summary

We have reports of isolated explosive triggered avalanches up to size 2.5 in the Duffey area and natural releases up to size 2.0 throughout the entire region. Rider triggering to size 1.5 persists.

Snowpack Summary

Recent storm snow totals in the Duffey Lakes is 15-25cm while in the Coquihalla summit area it's 30-40cm. In both areas, this overlies a previous 40cm. This most recent interface is yielding easy results and the new storm snow is reactive to rider traffic. The southerly winds have lee loaded open treeline and alpine terrain that faces north through east. The mid February interface (down roughly 60cm) includes crusts at lower elevations, surface hoar in protected areas and hard windslabs in the alpine. Below this the lower snowpack is well bonded and strong.

Avalanche Problems

Wind Slabs

Changing winds have created more widespread windslabbing.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 5

Persistent Slabs

Storm slabs linger and remain reactive where they exist in combination with buried surface hoar.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 5