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Archived

Avalanche Forecast

Mar 8th, 2018–Mar 9th, 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
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
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
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: Jasper.

Warming trend a welcome change. Increasing hazard for Ice Climbers in steep solar aspects. Start early, finish early!

Weather Forecast

Spring like warming trend with a distinct south westerly flow. Freezing levels rising to treeline elevations into the weekend. Trace to 10cm of snow overnight Thursday and clearing by Friday afternoon. Strong, gusting westerly winds in the Alpine.

Snowpack Summary

Facetting has weakened the snowpack in isolated areas in the forecast region. Melt freeze cycle BTL with moist surface snow on steeper, rocky solar aspects. The upper snowpack is 50 to 80 cm, over the seasonally persistent instability. Wind effect in open areas in the alpine and treeline elevations.

Avalanche Summary

Explosive assisted, solar induced, loose dry avalanches to sz 1.5 in BTL south and south-west  aspects entraining the facets and running fast.

Confidence

Avalanche Problems

Persistent Slabs

A cold, facetting, and structurally weak slab up to 80cm thick overlies faceted crystals (well developed in shallow areas). Low elevations will present as a loose dry avalanche problem.
If triggered dry loose point releases can form deeper deposits in terrain traps.Be wary of slopes that did not previously avalanche.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3

Loose Dry

Late afternoon problem in steep, solar rocky terrain. Found to be entraining the surrounding, facetted snowpack and will build up volume quickly.
Avoid ice climbs exposed to steep rocky terrain on solar aspects during the middle of the day.Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.

Aspects: North, North East, East.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2