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Archived

Avalanche Forecast

Mar 28th, 2014–Mar 29th, 2014
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
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Jasper.

Uncertainty is high. Few natural avalanches have been observed but a significant slab avalanche that stepped down to ground was accidentally released by a skier near Shangri-la on Thursday.

Weather Forecast

Light  snow and cool temperatures are expected for the weekend.  Temperatures are expected to climb next week.

Snowpack Summary

Total storm snow over the Mar 15 interface is approx. 40 cm but quite variable. Open areas in the southern forecast area are showing more surface wind effect. The Mar 15 interface is weak made up of facets over variable surfaces depending on aspect and exposure. Little slab development has been observed to date.

Avalanche Summary

Two size 1.5 to 2 avalanches were observed on steep south facing slopes today.  One skier accidental size 2.5 slab was reported from Thursday afternoon in the Shangri-La area. 

Confidence

Timing or intensity of solar radiation is uncertain

Avalanche Problems

Wind Slabs

Wind slabs in immediate lee areas have the potential to step down and create large full depth avalanches.
Avoid freshly wind loaded features.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

Expected Size: 1 - 2

Persistent Slabs

This avalanche condition is quite uncertain and large slopes should be treated with caution. Especially those with recent wind loading or those that face the sun.
Minimize exposure during periods of heavy loading from new snow, wind.Be aware of thin areas that may propogate to deeper instabilites.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 3

Loose Dry

Two avalanches were triggered by the sun today.
Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2