Avalanche Forecast

Archived

Nov 7th, 2021–Nov 8th, 2021

Alpine

Below Threshold.

Treeline

Below Threshold.

Below Treeline

Below Threshold.

Alpine

Below Threshold.

Treeline

Below Threshold.

Below Treeline

Below Threshold.

Alpine

Below Threshold.

Treeline

Below Threshold.

Below Treeline

Below Threshold.

Regions

Little Yoho.

Not as much snow coverage as previous winters. Skiing is still VERY rugged in most areas. We will update the bulletin and bring in the daily danger ratings as soon as it starts to snow significantly. Forecasting teams are monitoring daily.

Weather Forecast

A series of weather systems will bring snow to the forecast region this week. Totaly snow accumulation amounts at upper elevations could rang from 10 to 20cm by Friday. Daytime high temperatures at valley bottom will stay near 0C. Forecasted upper elevation winds will be at threshold values for snow transport for the beginning of the week.

Snowpack Summary

Very much early season conditions. Roughly 25- 30cm at 2000m increasing to 40-50cm in the alpine. Reports of a supportive crust near ground that provided enough support for skiing above TL at Bow Summit. Expect to find windslab development on lee features in the alpine. .

Avalanche Summary

Nothing recent. Some small avalanches were reported running out of very steep terrain on Oct 29th. No reports or observations since.

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.