Archived

Avalanche Forecast

Feb 18th, 2015–Feb 19th, 2015

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: Banff Yoho Kootenay.

The basal weakness persists. We will be stuck with Considerable danger in the alpine for some time yet.

Weather Forecast

The trend is for light precip and cooling temperatures over the next few days. Wind will shift to the North on Thursday evening. It could get significantly colder by the weekend. These weather inputs will have little effect on the current danger ratings.

Snowpack Summary

Some wind effect in open areas above tree line. Temperature crust present below 1800m. 60-70cm of well settled snow from recent storms and warm temperatures sits over weak facets and depth hoar at the bottom of the snowpack.

Avalanche Summary

No new avalanches were observed or reported today.

Confidence

Avalanche Problems

Deep Persistent Slabs

The base of the snowpack remains weak due to the presence of basal depth hoar and facets. Natural activity is tapering off, however human triggering is still likely on this layer.

Use conservative route selection, choose moderate angled and supported terrain with low consequence.Be aware of thin areas that may propogate to deeper instabilites.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3