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Archived

Avalanche Forecast

Apr 13th, 2018–Apr 14th, 2018
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
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
3: Considerable
The avalanche danger rating below treeline will be considerable
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
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Glacier.

An active weather system arriving this afternoon will cause the avalanche hazard to increase. Avoid avalanche terrain during periods of heavy loading from snow, rain and wind.

Weather Forecast

A pacific frontal system arrives mid-afternoon bringing intense precipitation into the evening with 10-20cm expected overnight. Winds SW 30 km/h with gusts to 70 km/h, freezing level at 1600m, alpine temp -5. Stormy weather continues with 11cm on Saturday, 7cm on Sunday, 9cm on Monday and 8cm on Tuesday.

Snowpack Summary

8cm of new snow fell overnight on a supportive crust between 1500-2000m. Moist snow below 1500m. At higher elevations there is approximately 20 cm dry snow with isolated wind slabs. Well-settled mid and lower snowpack with the Mar 15 crust complex down 70-90cm on solar aspects.

Avalanche Summary

A loose moist avalanche was observed late yesterday afternoon from a steep solar aspect below tree line.

Confidence

Timing of incoming weather systems is uncertain

Avalanche Problems

Wind Slabs

Strong SW winds overnight. Expect to see pockets of wind slab on lee features at higher elevation. A persistent layer down 70-90cm is currently dormant but may wake up with a big enough trigger such as a wind slab or cornice triggered avalanche.
Use caution in lee areas. Recent wind loading have created wind slabs.Avoid travel on slopes that are exposed to cornices overhead.

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

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1.5 - 2.5

Loose Wet

Use extra caution on solar slopes or if the snow is moist or wet.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2