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Avalanche Forecast

Archived

Nov 10th, 2020–Nov 11th, 2020

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

Regions

Glacier.

Extra caution on steep solar aspects in the alpine, where recent North winds have deposited pockets of windslab on a sun crust.

Sharpen your edges and cat-like reflexes for travel at treeline and below.

Weather Forecast

Cool and unsettled conditions across the province today.

Today: Cloudy with scattered flurries accumulating to 4cm. Alpine high -9*C, freezing level 900m. Winds Light-NW.

Tonight: Cloudy with clear periods. Alpine low -12*C, freezing level at valley bottom. Winds Light-NW.

Wednesday: A mix of sun and cloud. Freezing level 600m. Winds Light-W.

Snowpack Summary

The 5cm received overnight adds to the dust on crust to treeline. Last week's storm gave heavy rain as high as 2500m, and over 50cm of snow accompanied by extreme W winds at upper elevations. The weekend saw strong N'ly winds, causing reverse loading of storm snow into S'ly lees.

Avalanche Summary

No new avalanches reported yesterday. See the MIN for a recent Sa size 1 on a steep south aspect, where the recently formed windslab was triggered on top of the Nov 5 crust.

A significant loose wet avalanche cycle occurred with the last storm with slides up to size 3; the debris from this is now refrozen and presents a significant hazard to skiers.

Confidence

Due to the number of field observations

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.