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 4th, 2016–Feb 5th, 2016

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

Regions

Kananaskis.

A consistent weather pattern is keeping the danger levels steady. Despite this, take some time before stepping out into larger or more committing features.

Confidence

High

Weather Forecast

Tonight: Mainly cloudy with isolated flurries. Low -11. West winds 40k/hr & gusting to 65.Tomorrow: Mainly cloudy with isolated flurries. High -6. West winds 60km/hr.

Avalanche Summary

A couple of sz1 windslabs were noted today. They were below cliffs and are thought to be in areas where spindrift and wind have built thicker, denser windslabs.

Snowpack Summary

Below 1900m, the temperature crust from last week is now buried by 8cm of snow. This crust is unlikely to pose any problems down the road. The snowpack has regained some of it strength down low and is now more supportive in many areas. At treeline, the windslabs start to become evident in open areas or areas exposed to wind. Windslabs are down 20cm and only an issue in isolated areas. The Jan 6th layer is down 50-70cm at upper treeline and is hanging in there in terms of strength with the other layers. The alpine is either weak and facetted or a series of laminated windslabs. The exposure to wind seems to be the deciding factor.

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.