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Archived

Avalanche Forecast

Feb 26th, 2015–Feb 27th, 2015
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
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
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

Regions: Glacier.

We are in a period of low probability with high consequence. Buried instabilities will require large triggers such as cornice failures and intense solar input. Although hazard is low, manage you exposure.

Weather Forecast

Sunny skies this morning, but a weak weather system will bring building clouds by this afternoon.  Freezing levels will remain below 1200m with light winds.  Although there is a chance of flurries this afternoon, there will be no real accumulation.  The prevailing high pressure ridge returns Friday with dry conditions and sun through the weekend.

Snowpack Summary

Below 1900m a few cm's of snow sits on a hard crust. 15-20cm of snow sit on the Feb 18 surface hoar layer, up to 2200m. The Feb 14 crust is down 20-25 and is up to 10cm thick. Variable wind effect with pockets of thin hard slab in exposed areas above treeline. Crust on solar aspects. Persistent weak layers down 1-1.5m are stubborn to trigger.

Avalanche Summary

Several natural solar triggered avalanches and cornice failures were reported yesterday from outside the park boundary. Small pockets of wind slab have been triggered by skiers, which is primarily a concern on exposed slopes where the consequences are high (ie steep faces or over cliffs).

Confidence

Avalanche Problems

Persistent Slabs

There are several weak layers in the snowpack that are now difficult to trigger but result in very large avalanches when they do fail.  Strong solar radiation or a large cornice failure are possible triggers.
Conditions are greatly improved, but be mindful that deep instabilities are still present.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 3 - 4