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Avalanche Forecast

Archived

Apr 19th, 2015–Apr 20th, 2015

Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.

Regions

Little Yoho.

Great spring conditions. Expect high freezing level and hot afternoon temperatures by midweek. Start (very) early, finish early.

Weather Forecast

Calm and clear weather is expected to dominate the region for the next 4 days or so. Expect the freezing levels to rise considerably by midweek.

Snowpack Summary

Supportive crust on solar aspects for most of the day with 5cm of storm snow at higher elevations. Previous wind effect in alpine areas. Mid pack is well settled with no significant shears. Thin snowpack areas may have some weak basal facets but in general there are few concerns in the snowpack.

Avalanche Summary

No avalanches observed or reported.

Confidence

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.

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.