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Avalanche Forecast

Archived

Dec 9th, 2015–Dec 10th, 2015

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

Regions

Little Yoho.

Storm snow amounts are creeping up. Be mindful that surface hoar exists in specific areas at and below treeline. Be inquisitive and look for this layer.

Weather Forecast

Intermittent flurries are expected for the next few days. Accumulations will be low, amounting to 10cm ish by Friday. Another storm is possible on Saturday but the outlook is quite uncertain.

Snowpack Summary

Up to 30cm of storm snow now overlies the Dec 3rd interface of surface hoar, suncrust and surface facets. The Surface hoar up to 20mm exists up to 1800m in the Emerald Lake area. Above 1800m, due S to SW facing terrain a suncrust exists and other aspects are soft facets or wind hammered snow.

Avalanche Summary

No new avalanches were observed or reported.

Confidence

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.

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.