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Avalanche Forecast

Archived

Mar 11th, 2015–Mar 12th, 2015

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

Regions

Little Yoho.

Isolated areas of windslab have been reported in alpine areas, so anyone up on the high peaks should be watching for this. Additionally we advise climbers to avoid south and west facing ice climbs in gullies - rockfall and wet sluffs can be expected.

Weather Forecast

Westerly flow continues with a gradual falling of freezing levels over the main ranges on Thursday.  0-5 cm of snow (rain?) is expected overnight on Wed, and by Thursday we expect cloud cover and strong alpine winds to keep the higher elevations cool. Friday shows a dramatic warm up when the sky clears.

Snowpack Summary

Generally a well settled snow pack exists with moist snow on solar aspects below 2000 m.  Isolated wind slabs may be found near ridge tops in the alpine.

Avalanche Summary

No new avalanches reported or observed.

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.

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.