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Avalanche Forecast

Archived

Nov 13th, 2020–Nov 14th, 2020

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

Regions

Glacier.

Watch for soft storm slabs and sluffing on the November 5th crust. Steep solar aspects in the alpine may harbour pockets of windslab on sun crust.

Weather Forecast

Cloudy with scattered flurries and 4cm of accumulation. Alpine temps should reach -6C accompanied by S'ly winds in the 15-30kmh range. Freezing level is expected to rise to 1300m. Temperatures are forecast to cool tonight into tomorrow with continued light snowfall.

Snowpack Summary

Today's storm snow will add to the 15cm+ snow over the Nov 5th crust. At treeline the meter plus snowpack consists of a series of crusts with weaker snow between crusts. The strong Nov 5th crust reaches as high as 2500m. At upper alpine elevations last weekend's strong N'ly winds caused reverse loading of storm snow onto S'ly lee slopes.

Avalanche Summary

One size 1.5 avalanche was observed yesterday initiating off of 8812 Peak and running into the ski line of 8812 Bowl.

Confidence

Due to the number of field observations

Problems

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.

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.