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Archived

Avalanche Forecast

Jan 27th, 2017–Jan 28th, 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
4: High
The avalanche danger rating in the alpine will be high
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Jasper.

Wind, snow and warming temperatures may increase the avalanche hazard on Sunday.  Stay tuned!

Weather Forecast

Moderate SW winds can be expected at tree line and above building to strong on Sunday.  Temperatures will be mild with 10 cm possible on Sunday (rain showers in valley bottom).  Expecting clearing, winds easing and temperatures cooling beginning of next week.

Snowpack Summary

The snowpack is unpredictable. Shallow wind slabs have been failing on solar aspects in the alpine.  In sheltered areas, approximately 10-15 cm of settled snow is sitting on a weak and faceted mid-pack with depth hoar to ground.  The November crust  exists sporadically and is hard to find in the southern forecast area.

Avalanche Summary

Large slab avalanches to size 3 have been reported recently on open solar aspects in the alpine.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Sunday

Avalanche Problems

Wind Slabs

Big open alpine features, especially with a solar aspect, should be avoided. Recent natural avalanche activity on these slopes is expected to continue.
Minimize exposure to steep, planer south facing Alpine slopes

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 3

Deep Persistent Slabs

The weak lower snowpack is susceptible to triggering.
Be cautious in shallow snowpack areas where triggering is more likely.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3