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Avalanche Forecast

Archived

Nov 28th, 2015–Nov 29th, 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

Little Yoho.

Despite the fact that a well settled snowpack exists in most areas there are still some tricks out there. Be aware of  what the inversion may be doing to the terrain above you and remember that windslabs may still release in isolated areas. TH

Weather Forecast

Clear conditions with light winds and very warm alpine temperatures are forecast for Sunday and Monday with alpine temperatures remaining near freezing in the evenings. In sheltered sunny locations temperatures will return to well above freezing during the middle of the day. A temperature inversion will keep the valley bottoms cool.

Snowpack Summary

Strong temperature inversions have allowed sun crust formation on solar aspects TL and above while faceting continues TL and below. Expect to find widespread and variable windslabs in open areas at tree line and above. Isolated wind slabs that overly the typical Rockies facets can still be expected in thin areas.

Avalanche Summary

Some small solar triggered sluffs to size 1 observed on Friday. One older size 3 natural avalanche was also observed on the White Pyramid Glacier. This appears to have slid during the last major wind event a few days ago. In places it stepped down to glacier ice showing that on high North aspects there can be a basal weak layer to keep in mind.

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.