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Archived

Avalanche Forecast

Mar 11th, 2014–Mar 12th, 2014
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
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

Regions: Banff Yoho Kootenay.

Touchy avalanche conditions continue. Now is the time to avoid all avalanche terrain.Avalanche control will be conducted on Mt. Stephen and Mt. Dennis on Wednesday. Please no skiing or climbing in these areas.

Weather Forecast

Another sunny day on Wednesday with freezing levels around 1800 m. Cooler temperatures and some isolated flurries forecast for Thursday and Friday.

Snowpack Summary

85-100cm of storm snow has fallen in the Sunshine, Kootenay and Yoho areas, with 40-60cm around Lake Louise and Bow Summit since Mar 2nd. This storm snow has overloaded the Feb 10th layer of facets, surface hoar and sun crust, and in thinner snowpack areas, the deeper basal facet layer, causing large, destructive avalanches with wide propagations.

Avalanche Summary

A widespread natural avalanche cycle occurred in past 48 hours on all aspects and elevations. Two large remotely skier triggered avalanches were reported yesterday in the Lake Louise area. Natural cycle appears to be over but conditions remain very touchy and reactive to skier triggering.

Confidence

Due to the number and quality of field observations

Avalanche Problems

Persistent Slabs

Natural avalanche cycle is over but conditions are still very touchy and ripe for skier triggering. Any avalanche triggered has the potential to be very large.
Avoid areas with overhead hazard.Avoid all avalanche terrain.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 2 - 3

Storm Slabs

Storm slab is still touchy and has potential to step down to deeper persistent layers.
Avoid all avalanche terrain.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 1 - 3