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Archived

Avalanche Forecast

Jan 31st, 2019–Feb 1st, 2019
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
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
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
1: Low
The avalanche danger rating below treeline will be low

Regions: Banff Yoho Kootenay.

Friday marks a change in conditions with an incoming storm. Pay attention to new snowfall amounts and what the wind is doing.

Weather Forecast

Snow beginning on Friday with various models forecasting between 10 and 20 cm along the divide by the end of the day. More snow on Saturday (up to 30 cm) and then very cold arctic air settles in for Sunday. Winds forecast to be mod to strong from the SW on Friday.

Snowpack Summary

Extensive wind effect in alpine from last weeks strong winds. The mid-pack is increasingly settled (up to P) down to the Dec 10 interface (down 60-130 cm). In shallower snowpack areas weak facets exist below the Dec 10 interface, and stability tests show moderate-hard results within the facets.

Avalanche Summary

No new avalanche activity

Confidence

Intensity of incoming weather systems is uncertain on Friday

Avalanche Problems

Deep Persistent Slabs

A well settled mid-pack sits over top of a deep persistent facet layer (Dec 10 layer). Stability tests show moderate to hard results within this facet layer.
Avoid thin, rocky or unsupported slopes.

Aspects: All aspects.

Elevations: Alpine.

Likelihood: Unlikely

Expected Size: 1 - 3

Wind Slabs

Fresh wind slabs are expected from forecasted snow and winds on Friday.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 1.5