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Avalanche Forecast

Archived

Mar 20th, 2020–Mar 21st, 2020

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

Regions

Jasper.

Colder temperatures are on the way. Good skiing can still be found on sheltered polar aspects Tree line and below. Keep your activities mellow and finish early. Now is not the time to get into complicated situations.

Weather Forecast

Saturday: Cloudy with sunny periods. High -8 No new snow expected. Freezing levels at Valley bottom

Sunday: Cloudy with isolated flurries. HIgh -7 with 30km/h SW winds

Monday: Snow. Up to 10cm of snow High -4 Gusty SW winds to 40km/h Freezing levels to Valley bottom

More detailed forecast at: Mountain weather forecast

Snowpack Summary

Snowpack continues to settle due to Diurnal conditions. Scoured from previous winds. Old hard slabs exists in the alpine and open tree line. More confidence in the southern snowpack. Cornices remain an overhead hazard,

The mornings can provide good travel on the melt freeze crust. By early afternoon the crust will start to break down.

Avalanche Summary

A road patrol down highway 93 noted a few wet loose avalanches to size 1.5 out of TL and below on solar aspects. Water running on cliff bands that are in direct sunlight also observed in the Maligne lake road area.

Confidence

Problems

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.