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Archived

Avalanche Forecast

Nov 29th, 2017–Nov 30th, 2017
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
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
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
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Glacier.

Very limited observations recently assess each slope independently. Expect some natural avalanche activity in extreme terrain, human triggered avalanches are still possible.

Weather Forecast

A dirty ridge of high pressure forms over us today, giving us a mixed bag of weather, from sunny periods to isolated flurries. The freezing level will hover around 1000m, winds will be moderate from the SW and an Alpine high of -7. A cold front will pass by later this afternoon into tonight, depositing another 10-15cm of new snow.

Snowpack Summary

Another 20+ cm of new snow fell in the last 24 hours at tree line. The new snow overlies a variety of older surface conditions, from wind slabs in exposed areas at and above tree line to protected storm snow in sheltered areas. The Nov 23rd/26th crust complex is now buried approximately 50cm.

Avalanche Summary

No new avalanches were observed in the highway corridor yesterday or reported from the backcountry.

Confidence

Due to the number of field observations

Avalanche Problems

Storm Slabs

20+ cm of new snow with moderate winds fell in the last 24 hours. Expect slab formation on exposed terrain features and unsupported convex rolls. The storm snow has buried old wind slabs, which could still be reactive on specific terrain features.
Dig down to find and test weak layers before committing to a line.Use caution in alpine and open treeline lees. Recent snowfall has created storm slabs.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2