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Archived

Avalanche Forecast

Apr 12th, 2017–Apr 13th, 2017
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
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
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: Kootenay Boundary.

New snow and shifting wind directions may create wind slabs on a variety of aspects, including slopes that are generally windward.

Confidence

Moderate - Timing, track, or intensity of incoming weather system is uncertain

Weather Forecast

THURSDAY: 10-20 cm of new snow (higher end of range in the west). Light to moderate southwesterly ridgetop winds. Freezing level around 1500m.FRIDAY: Mostly cloudy. Light Southwesterly ridgetop winds. Freezing level around 1500 m.SATURDAY: Mix of sun and cloud. Light westerly ridgetop winds. Freezing level around 1700m.

Avalanche Summary

Numerous naturally triggered loose wet avalanches to size 1.5 were reported in this region on Tuesday. Fresh wind slabs will be the primary concern on Thursday.

Snowpack Summary

New snow and shifting wind directions have created fresh wind slabs on a variety of aspects at Treeline and above. The new snow will be prone to sliding in steep terrain where it is sitting on a crust. Cornices are large in some areas and could trigger large avalanches when they fail.

Avalanche Problems

Wind Slabs

Shifting wind directions have created fresh wind slabs on a variety of aspects.
Be cautious as you transition into wind affected terrain.Use ridges or ribs to avoid pockets of wind loaded snow.Pay attention to changing conditions with elevation.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2