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

Apr 24th, 2014–Apr 25th, 2014

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

Little Yoho.

Clear skies and cold temperatures produced a solid freeze last night. The same is expected for Friday if the skies clear tonight. Excellent conditions: soft powder on shaded slopes and frozen/corn snow in the sunshine below 2200m in the afternoon.

Weather Forecast

Mixed clear skies and some clouds overnight should result in another good surface freeze on the snowpack. Friday looks like a repeat of Thursday, with mixed sun and clouds and freezing levels rising to 2100 m. No new snow expected, and highs of +1 expected for Friday afternoon.

Snowpack Summary

Clear skies and overnight temperatures below freezing should result in a strong surface crust on Friday morning. This crust exists up to 2300m, above where 10cm of dry powder overlies a dry, winter snowpack. Isolated windslabs were reported in the high alpine (3000m) near ridges. Conditions are solid, but watch for deterioration in the afternoon.

Avalanche Summary

No new avalanches were observed or reported today.

Confidence

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.