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Avalanche Forecast

Archived

Apr 7th, 2015–Apr 8th, 2015

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Jasper.

Strong solar radiation in the afternoon has the potential to increase the avalanche danger on steep solar aspects. Avoid traveling on routes which are exposed to cornices.

Weather Forecast

The next few days will see clear skies with good overnight recovery and daytime temperatures reaching into the low teens by Thursday. Light SW winds will not have a significant impact on the snowpack. The weekend's forecast will call for precipitation and warmer temperatures

Snowpack Summary

Suncrust on solar aspects. 5-10 cm over a supportive temperature crust can be found on all aspects tree line and above to 2500m. The weak basal facet layer is bridged by a strong mid-pack in most areas at treeline and above.

Avalanche Summary

Several loose snow avalanches originating near ridgetop on solar aspects. Debris from recent cornice falls were observed on steep unskiable terrain which DID NOT propagate any avalanches on the slopes below. Despite relatively sunny skies, the air remained cool dampening avalanche activity. Likely the same condition expected Wednesday.

Confidence

Problems

Cornices

Cornice Fall is the release of an overhanging mass of snow that forms as the wind moves snow over a sharp terrain feature, such as a ridge, and deposits snow on the downwind (leeward) side. Cornices range in size from small wind drifts of soft snow to large overhangs of hard snow that are 30 feet (10 meters) or taller. They can break off the terrain suddenly and pull back onto the ridge top and catch people by surprise even on the flat ground above the slope. Even small cornices can have enough mass to be destructive and deadly. Cornice Fall can entrain loose surface snow or trigger slab avalanches.