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Archived

Avalanche Forecast

Jan 29th, 2017–Jan 30th, 2017
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
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: Jasper.

Wind and new snow continue to load an already stressed snowpack

Weather Forecast

Forecasted snow (10 to 15cm) to continue through the evening Sunday. SW winds with strong to extreme ridge top values, tapering off and shifting to northerly though Monday/Tuesday. Increasing pressure, blue skies and arctic temps by mid-week.

Snowpack Summary

New snow being re-distributed by moderate to strong SW winds, loading N to NE aspects on an already stressed facet interface down between 20 to 50cm. Hard windslab over a weak mid-pack, over an even weaker facet and depth hoar base to ground.

Avalanche Summary

Active avalanche cycle through the forecast region. Loading continuing though the night Sunday. Significant activity directly observed from Alpine and TL elevations between (2200m - 2500m) Saturday. No new observations Sunday due to poor visibility.

Confidence

Forecast snowfall amounts are uncertain on Sunday

Avalanche Problems

Wind Slabs

Big open features and climbs with significant overhead hazard should be avoided as the weak bond between layers strengthens.
Minimize overhead exposure during periods of heavy loading from new snow, wind.Use caution above cliffs where small avalanches may have severe consequences.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 2 - 3

Loose Dry

Wind loading and shedding from steep faces, especially concerning for ice climbers.
Minimize overhead exposure during periods of heavy loading from new snow, wind.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2