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Avalanche Forecast

Archived

Nov 11th, 2018–Nov 12th, 2018

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

Regions

Glacier.

Hidden rocks and stumps are the main hazards today. Keep an eye out for people above and below you. Rideable terrain is still limited due to minimal snow, therefore people are stacked up on the same ski lines.

Weather Forecast

A mix of sun and cloud today, light ridge-top winds, and freezing levels rising to 1100m. Much the same on Monday but a weak alpine inversion developing, bringing cooler valley temp's and slightly warmer conditions in the alpine. Freezing levels could rise to 1500m, but winds will remain light. The next storm should arrive late Tuesday.

Snowpack Summary

Snow depths vary from 30cm at Rogers Pass, to 130-150cm in alpine areas. Sheltered areas at and above tree-line are holding unconsolidated snow, but pockets of wind-slab exist in immediate lee areas. A melt-freeze crust in the bottom 50cm of the snowpack is an early layer of concern, especially in the alpine on open, planar slopes.

Avalanche Summary

No new avalanches have been observed in the highway corridor nor the Connaught drainage in the last 48 hours.

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.