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 3rd, 2024–Jan 4th, 2024

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

Banff Yoho Kootenay, Little Yoho, Banff, East Side 93N, Kootenay, Lake Louise, LLSA, Sunshine, West Side 93N, Field.

There are two facts: the drought continues, and the snowpack base is weak and faceted. Where avalanches can be triggered is less certain, and stepping out into bigger alpine terrain still inspires little confidence.

Confidence

Moderate

Avalanche Summary

No new avalanches were observed or reported on Wednesday.

Snowpack Summary

Trace amounts of snow bury surface hoar below treeline and sun crusts on steep solar slopes treeline and above. Wind effect and old, hard-slab are found TL and above. A temperature crust from just before Christmas is now buried 10-20 cm below 1900m.

The mid-pack contains a rain crust which can be found as high as 2300m in southern areas.

The basal third of the snowpack consists of a mix of weak facets and depth hoar.

Treeline snow depths range from 60-100 cm.

Weather Summary

Thursday: Trace amounts of snow, cloudy, and moderate to strong west winds. Mild temperatures (-8C to -5C).

Friday: Decreasing West winds in the AM, then increasing in the afternoon with trace amounts of snow.

For more information, click Mountain Weather Forecast.

Terrain and Travel Advice

  • Uncertainty is best managed through conservative terrain choices at this time.
  • Avoid thin areas like rock outcroppings where you're most likely to trigger avalanches failing on deep weak layers.
  • Use caution when approaching steep and rocky terrian.

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.