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Archived

Avalanche Forecast

Feb 26th, 2018–Feb 27th, 2018
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
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Watch for soft slabs along ridge crest and lee slope terrain.

Weather Forecast

Alpine high of -12C along with light precipitation and moderate W'ly winds for today.  Tuesday through Thursday is forecast to bring light snowfall each day along with W'ly through S'ly winds in the  moderate gusting to strong range.

Snowpack Summary

~25cm of low density snow from the last 48hrs with mod S winds forming soft slabs along lee of ridges. Storm snow landing on a facetted old snow surface making for a weak bond. Avoid exposure to the many large cornices. Windslab buried under recent storm snow. Solar aspects have a crust buried ~50cm that requires caution. PWL now buried 150-200cm.

Avalanche Summary

15 avalanches, mostly in the size 2-2.5 range in the highway corridor yesterday, all initiating in the storm snow and most running to half fan on the run outs. No new avalanche reports from the backcountry.

Confidence

Due to the number of field observations

Avalanche Problems

Storm Slabs

Moderate S'ly winds and 25cm of storm snow all landing on a facetted old snow surface. Where wind touched watch for a reactive storm slab at and above treeline. Recently buried windslab is also a concern more so on steeper solar locations.
Be careful with wind loaded pockets, especially near ridge crests and roll-overs.Pay attention to overhead hazards like cornices.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2.5

Loose Dry

In steep terrain expect surface power sluffing, which can be an issue in terrain traps such as gully features. Stay situationally aware as to people above and below you.
Be careful of loose dry power sluffing in steep terrain..

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2