Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Dec 19th, 2021–Dec 20th, 2021

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

Jasper.

Avalanche hazard is decreasing, however, recent winds made looking for good skiing a little more difficult.

Weather Forecast

Monday: Sunny with cloudy periods. Precipitation: Nil. Alpine temperature: High -14 °C. Ridge wind west: 10-20 km/h.Tuesday: A mix of sun and cloud. Precipitation: Nil. Alpine temperature: Low -18 °C, High -13 °C. Ridge wind west: 20 km/h. Freezing level at valley bottom.

Snowpack Summary

Moderate SW winds and small amounts of new snow has formed sensitive wind slabs in alpine and treeline areas. Mid and lower snowpack are mostly well consolidated base on recent observations.

Avalanche Summary

Avalanche control with use of explosives produced no significant results other than 2 small thin wind slabs. 1 larger natural wind slab was observed right below ridge crest in steep alpine feature on NE aspect.

Please share your trip report, Ice and/or Riding conditions on Avalanche Canada's, Mountain Information Network!

Confidence

The weather pattern is stable

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.

Deep Persistent Slabs

Deep Persistent Slab avalanches are the release of a thick cohesive layer of hard snow (a slab), when the bond breaks between the slab and an underlying persistent weak layer deep in the snowpack. The most common persistent weak layers involved in deep, persistent slabs are depth hoar or facets surrounding a deeply buried crust. Deep Persistent Slabs are typically hard to trigger, are very destructive and dangerous due to the large mass of snow involved, and can persist for months once developed. They are often triggered from areas where the snow is shallow and weak, and are particularly difficult to forecast for and manage.