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Avalanche Forecast

Archived

Apr 19th, 2018–Apr 20th, 2018

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely, human triggered possible.

Regions

Kananaskis.

Start early and finish early. Expect the avalanche hazard to increase to HIGH near mid day with solar radiation, especially on solar aspects.

Confidence

-

Weather Forecast

Friday is forecast to bring a mix of sun and cloud and an alpine temperature of -1c. Winds are to be 25km/h from the SW.

Avalanche Summary

Several size 2 on solar aspects. One size 3 in the Goat Range was observed on an East aspects in the alpine. Expect more activity and cornice failures when the sun comes out.  The cornices are large and can trigger deeper slabs.

Snowpack Summary

Spring time is here. Expect cool temperatures and a supportive crust below 2150m first thing in the morning. Expect the snow to become moist on solar aspects by mid day with the avalanche hazard increasing. Good skiing along with dry snow can still be found on North aspects and shady slopes above 2000m.

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.