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Archived

Avalanche Forecast

Apr 2nd, 2022–Apr 3rd, 2022
Alpine
1: Low
The avalanche danger rating in the alpine will be low
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
2: Moderate
The avalanche danger rating below treeline will be moderate
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

Regions: Banff Yoho Kootenay.

A low will start to influence the area with light precipitation Sunday afternoon that will build into heavier accumulations Monday.

The potential for a poor freeze, and possibly rain, may lead to a deterioration in the crusts BTL and maybe TL Monday. 

Weather Forecast

A good freeze can be expected Sun AM under a brief ridge before a low pushes in through the afternoon. Trace amounts of snow above about 1800m. A weaker freeze Mon AM as the low reaches the Rockies with 2-5cm of snow overnight. SW winds will increase to moderate/strong with another 5-10 cm above 1900m. Rain is possible at lower elevations.

Snowpack Summary

Trace amounts of new snow over surface melt-freeze crusts that can be found on all aspects up to approx. 2300m and higher on solar aspects. On high elevation north aspects, deeper dry snow persists with isolated thin wind slabs in the alpine. The mid-pack is well settled but has several persistent layers consisting of crusts and/or facets.

Avalanche Summary

Mistaya Lodge reported a sz 1.5 slab on a glacial ice feature, NE aspect , 30-40cm deep, that failed naturally within recent storm snow accumulations.

Confidence

Intensity of incoming weather systems is uncertain on Sunday

Avalanche Problems

Wind Slabs

Reactive alpine slabs have been encountered over that last few days. Although small in size, these could be enough to send travelers tumbling down a face or couloir. Expect this problem to increase on Monday with new snow and increasing SW winds.

  • Use caution in lee areas. Recent loading has created reactive slabs.

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

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 1.5

Loose Wet

Watch the recovery and freezing levels carefully each night. Consider the potential impacts of heating in the form of Sun and rain especially at lower elevations as the low takes hold  Sunday afternoon.

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

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

Elevations: Below Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2