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Archived

Avalanche Forecast

Mar 7th, 2016–Mar 8th, 2016
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
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
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Little Yoho.

Ice climbers pay attention to overhead hazard and how quickly the day is warming up. Significant sluffing was observed on lower elevation ice climbs on Monday.

Weather Forecast

Tuesday should be mainly cloudy with isolated flurries. Light to moderate SW winds near ridge tops. The freezing levels will be at surface overnight and rising to 1700 m during the day. An approaching system may bring more significant snow on Thursday.

Snowpack Summary

Ten to 15 cm new snow lies  over-top of a well settled mid and lower pack. Suncrust below new snow on all aspects below 1800m and below 2300m on solar aspects. Isolated wind effect and small wind slabs near ridge-tops. No significant shears found in mid and lower pack.

Avalanche Summary

Report on Monday of a skier triggered avalanche on the Wapta near Mt. Collie. Size 2.5 on SE aspect at 2600m.

Confidence

Avalanche Problems

Loose Wet

Loose wet avalanches can be anticipated on solar aspects in the afternoon.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2

Wind Slabs

West winds have formed small wind slabs in predictable areas on the leeward sides of ridges. Pay close attention to how the snow surface feels, ski test on small rolls, and look for clues like cracking.

Aspects: North, North East, East.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2

Persistent Slabs

The persistent weak layers from January and February are bonding well, and have a low likelihood of triggering in most of the forecast area. Overall the snowpack is quite strong, but continue to be wary, especially in shallow snow-pack areas.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 2 - 3