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Avalanche Forecast

Archived

Nov 21st, 2019–Nov 22nd, 2019

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

Regions

Jasper.

Low Ratings but questionable riding conditions. Cross loaded gulleys will threaten ice climbs from above.

Play Cautiously.

Weather Forecast

The ridge of high pressure will, over the next 3 days, flatten and move south. This will allow a strong westerly flow of cold moist air over the region for the weekend. For more details: Avalanche Canada's, Mountain Weather Forecast.

Snowpack Summary

Variable surfaces including temp/rain crust, hard wind press and loose snow sit above the November rain crust which goes as high as 2200m. Total snow pack height in alpine is around 45-85 cm. Wind pressed/scoured features to wind slabs in lee features in the high alpine. Cross loaded gulleys may threaten ice climbs from above.

Avalanche Summary

Previous strong winds transported old snow through the high alpine peaks and ridge tops. Hazard can be expected to increase in isolated areas where wind effect and loading is visible. No natural activity observed or reported in the forecast region.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Sunday

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.