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Archived

Avalanche Forecast

Mar 28th, 2018–Mar 29th, 2018
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
2: Moderate
The avalanche danger rating at treeline will be moderate
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
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Glacier.

Pay attention to signs of instability like cracking and collapsing of snow layers as the storm snow settles and bonds with the old snow surface. Investigate and test the snowpack before committing to any line.

Weather Forecast

A break between storms today with a mix of sun and cloud in the forecast with isolated convective flurries. Temperatures will range from 0 to -9 with a freezing level up to 1100m and 20-50km/hr winds from the west. The next pulse of snow will arrive Thursday and is forecasted to deliver 10-20cm by Friday evening, with another storm arriving Sunday.

Snowpack Summary

30cm in the past 24hrs brings the weekly total to 60cm of storm snow. Moderate to strong winds have redistributed the new snow into wind slab on lee features. Watch for a buried crust up to 2000m on all aspects and on steep solar aspects into the alpine down 30-60cm.

Avalanche Summary

Artillery avalanche control yesterday produced results up to size 3.0.Skier triggered sz 2 wind slab on Monday afternoon occurred on a steep NE aspect, no involvement, read the report here. A sz 2 skier accidental occurred Saturday midday on a westerly aspect on a cross loaded feature. It ran for 350m and injured the skier.

Confidence

Avalanche Problems

Storm Slabs

60cm of storm snow buries a crust up to 2000m on all aspects and into the alpine on solar aspects. 30cm of new snow is settling quickly could be reactive to human presence. Moderate to strong winds have formed wind slabs on lee features.
Use caution in lee areas. Recent wind loading have created wind slabs.The storm slab may be more sensitive to human triggering on solar aspects where it sits on a crust

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2.5