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Archived

Avalanche Forecast

Nov 24th, 2013–Nov 25th, 2013
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.

Skier support is minimal below treeline. Early season hazards lurk just below the snow. Temperatures may warm slightly on Monday and Tuesday. Watch for increase in avalanche activity particularly on solar aspects.

Weather Forecast

Flurries, light to moderate Westerly winds, will prevail through Monday. Tuesday may have warmer valley bottom temperatures and sunny periods.

Snowpack Summary

Snowpack ranges from 5-100cm with 4cm raincrust down 40cm at treeline and above. A 15cm windslab exists in open areas treeline and above. Moderate wind transport continues.

Avalanche Summary

48 hour or older three size 2's noted off Kitchener ridge, East aspect. A few size 1 solar releases noted on South aspects.

Confidence

Due to the number and quality of field observations

Avalanche Problems

Persistent Slabs

4cm thick raincrust exists 20cm off the ground with facets above and below. Easy result on this layer with extended column test highlights the potential for triggering. Some whumphing occurred on this layer but not widespread.
Be careful with wind loaded pockets while approaching and climbing ice routes.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3

Wind Slabs

Moderate winds continue to transport snow further developing this condition. Observers found it to be 15cm thick at treeline and suspect it to be thicker in other locations.
Assess start zones carefully and use safe travel techniques.

Aspects: North, North East, East.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2