Archived

Avalanche Forecast

Dec 17th, 2017–Dec 18th, 2017

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

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

Regions: Banff Yoho Kootenay.

We are on the cusp of change. Wind slabs are just starting to develop in alpine lee areas.

Weather Forecast

Light precip (up to 10cm) and continued moderate wind from the west will persist through Monday and into Tuesday. Temperatures are expected to be seasonal.

Snowpack Summary

Very thin wind slabs now cover the mix of sun crust, facets, wind slab and surface hoar depending on the aspect and elevation. The main features in the snowpack are the Nov 27th and Nov 23rd crusts down 10-40cm, and the Halloween crust/facet layer sitting 30-50 cm above the ground, which have been dormant recently.

Avalanche Summary

No new avalanches observed or reported in the past several days.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Tuesday

Avalanche Problems

Wind Slabs

Windslabs are just starting to develop in lee alpine areas. Touchiness will depend locally on snow amounts and wind velocity.

Aspects: North, North East, East.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2