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

Jan 6th, 2020–Jan 7th, 2020

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

Regions

Little Yoho.

Timing of the incoming storm is still uncertain, but be aware that as snow accumulation intensifies the avalanche hazard will quickly increase.

Weather Forecast

A cold front encroaching Tuesday will bring more precipitation to the forecast region, expected accumulation values range from 20-40cm around Little Yoho. The peak intensity of the front is expected to arrive Tuesday night. As the system passes through an arctic air mass will begging to dominate the region bringing clear skies and cold temps.

Snowpack Summary

20-40 cm of storm snow, strong Westerly winds and mild temperatures are promoting slab formation. Most areas have generally supportive midpack over facets and depth hoar at the base. In deeper areas the snowpack is well settled with limited facets and weak layers. Digging down to see what is in the snowpack in your area is important.

Avalanche Summary

Explosive control in Yoho produced numerus avalanches to size 2.5 releasing from upper snowpack instabilities. Natural avalanche activity has tappers momentarily but expect this to increase once again as more snow and winds are forecasted from Tuesday, Wednesday.

Confidence

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.

Loose Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.

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.