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Avalanche Forecast

Archived

Mar 26th, 2015–Mar 27th, 2015

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

Regions

Little Yoho.

Pay attention to the freezing levels on Friday. Some forecast are suggesting freezing levels as high as 2600 m. If sun comes out conditions will deteriorate rapidly.

Weather Forecast

The freezing levels are forecast to rise to 2600 m on Friday before dropping back down on the weekend. Isolated wet flurries expected on Friday.

Snowpack Summary

20-30 cm of recent storm snow at upper elevations is starting to form soft wind slabs on lee terrain in the alpine. These wind slabs overlay a variety of hard surfaces, particulary on south aspects. The mid pack and base of the snowpack are well settled and well bonded overall.

Avalanche Summary

No avalanches observed or reported in this area today. See report of skier triggered avalanche in Banff/Yoho/Kootenay Region.

Confidence

Freezing levels are uncertain on Friday

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.

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.