Avalanche Forecast

Archived

Nov 12th, 2021–Nov 13th, 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

Jasper.

Saturday looks like the "Calm before the Storm". A warm weather system will be arriving Saturday night / Sunday morning, and at the time of writing models are predicting anywhere from 30 to 88cm on Sunday and Monday......

Weather Forecast

Saturday: Mainly cloudy with isolated flurries. Precipitation: Trace. High -7 C. Wind west: 20 km/h gusting to 70 km/h.

Sunday: Snow, heavy at times. Accumulation: 48 cm. Low -8 C, High -1 C. Wind southwest: 20 km/h gusting to 50 km/h.

Monday: Snow, heavy at times. Accumulation: 40 cm. Low -10 C, High -1 C. Wind west: 15 km/h gusting to 45 km/h.

Snowpack Summary

Small amounts of new snow and continuous moderate to strong south west winds have been ongoing for the past week. Alpine and tree-line areas are slowly gaining enough snow for avalanches, particularly in leeward alpine bowls, gullies, and around ridge lines.

Avalanche Summary

There have been isolated reports of smaller wind slabs in alpine features over the past week, but not a lot of people are out in the mountains so take that into account in your decision making.

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.