Archived

Avalanche Forecast

Jan 19th, 2017–Jan 20th, 2017

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

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

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

Regions: Jasper.

Cautious route finding and conservative terrain choices are required with the unpredictable snow conditions.

Weather Forecast

No forecasted precip, light SW winds and cooling temps into the weekend.

Snowpack Summary

New transported HST building developing wind slabs in the ALP on N to E asps. At TL, soft slab and wind slabs in open areas over a faceted midpack to depth hoar. Nov crust in isolated areas; deeper, sheltered north aspects. Thin rain crust BTL on all aspects below 1600m. Loose point releases from steep un-skiable terrain at all elevations.

Avalanche Summary

No avalanches reported or observed.

Confidence

Due to the number and quality of field observations

Avalanche Problems

Wind Slabs

Cross-loaded gullies and ridgeline features will be especially sensitive to human triggering.

Use caution in lee areas. Recent wind loading has created wind slabs.If triggered the wind slabs may step down to deeper layers resulting in large avalanches.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 3

Storm Slabs

Storm slabs may be present especially at tree-line. If triggered, it is likely it will initiate the rest of the weak faceted snowpack.

Use caution in alpine and open treeline lees. Recent snowfall has created storm slabs.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Deep Persistent Slabs

Isolated locations where this layer is persisting. Has morphed into depth hoar in many areas.

If triggered the storm slabs may step down to deeper layers resulting in large avalanches.Use conservative route selection, choose moderate angled and supported terrain with low consequence.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3