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

Feb 24th, 2020–Feb 25th, 2020

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

Regions

Jasper.

The snowpack in the Whistler Creek / Tonquin region has a significantly less supportive midpack. As a result we have seen a few large avalanches. Be conservative in alpine terrain.

Weather Forecast

Cloudy with sunny periods Tuesday and trace amounts of snow. Alpine high -10 C and wind from the west at 15 km/h.

Find the Alberta Rockies weather synopsis here: Mountain Weather Forecast

Snowpack Summary

15cm new snow over the last 48 hours overlies wind slab and hard slab in the alpine, possible sun crust on steep solar aspects treeline and below. The southern section of the forecast region has a generally a more bridged midpack than the north around Marmot basin. Basal sections of the snowpack consist of up to 40cms of depth hoar and facets.

Avalanche Summary

During field patrol on Hwy 93 Monday no new avalanches were observed.

Confidence

Due to the number of field observations

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.