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Avalanche Forecast

Apr 18th, 2023–Apr 19th, 2023
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold

The weather is proving difficult to forecast across the region. Localized storm slabs and building windslabs are possible. It's a good time to take a step back and give the snowpack time to stabilize.

Confidence

Moderate

Avalanche Summary

No new reports of natural avalanche activity but still be vigilant and make careful assessments.

Don't forget to post avalanche observations to the MIN.

Snowpack Summary

New snow continues to build around the Icefields area and sits on top of a variety of surfaces - crusts on solar aspects & BTL and old wind pressed/ slab on exposed northerly aspects.

BTL is in a daily melt-freeze cycle. At TL, the mid-pack consists of multiple layers of sun crusts or facets and shows long propagation potential on connected features. Depth hoar and basal facets at the base.

Weather Summary

Weather models are a bit wacky right now. It's the result of forecasted convective storms.

Snowfall overnight Tuesday is expected to be most intense around the Icefields (~10-15cm), Parkers Ridge, and along the divide. Flurries will continue through Wednesday and overnight.

Look for detailed weather products and tutorials at Avalanche Canada

Terrain and Travel Advice

  • If triggered, storm slabs in-motion may step down to deeper layers and result in very large avalanches.

Avalanche Problems

Storm Slabs

A new, non-persistent storm slab is expected to be widespread at higher elevations predominately around the Icefields and along the Divide.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1.5 - 2.5

Persistent Slabs

A cornucopia of persistent weak layers in the midpack can be found as facets on polar aspects and sun crusts on solar aspects.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1.5 - 2.5

Deep Persistent Slabs

The bottom of the snowpack is inherently weak with well-developed Facets and Depth Hoar.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 2 - 3.5