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Archived

Avalanche Forecast

Mar 23rd, 2012–Mar 24th, 2012
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
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
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: Banff Yoho Kootenay.

A nice weekend forecast with sun, rising freezing levels, and light winds. Expect steep solar aspects to "wake up" Sat. afternoon and Sunday to increase the overall hazard rating. Good skiing on shaded slopes. SH

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

on Saturday

Avalanche Problems

Loose Wet

Freezing levels to 2000m Sat. and even higher on Sunday will trigger a cycle on solar aspects. This could be the trigger that tickles the deeper layers, and it is a good idea to limit exposure to those aspects in the afternoon.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 3

Persistent Slabs

The Valentines surface hoar is 70-150cm deep. It is far less active in deep snowpack areas, but is possible to trigger from shallow areas mainly E of the divide. This has been the case in numerous incidents this past week.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3

Deep Persistent Slabs

Thin snowpack areas are most susceptible to triggering the basal depth hoar. As well, any avalanche initiated on the Valentines surface hoar layer could step down to the basal weakness. Thin has not been a major issue in thick snowpack areas.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3