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

Mar 26th, 2023–Mar 27th, 2023

Alpine
Natural avalanches unlikely.
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.

Watch for a weakening of the snowpack due to solar heating and possible heat related cornice failures when the skies clear over the next few days.

While a deeper, stronger, snowpack exists in many parts of the Yoho zone, pay attention to shallow snowpack areas where the potential to trigger the deeper weak layers remains more likely.

Confidence

High

Avalanche Summary

No new avalanches were observed or reported on Sunday in this region. Still seeing some human triggered avalanches at treeline and in the alpine in areas to the East with a thinner snowpack.

Snowpack Summary

5-10 cm of storm snow sits over buried temperature crusts to 1500 m, sun crusts to ridgetop on solar aspects, and facets on shaded slopes. The midpack in this area has several crust and facet layers that have been unreactive recently. The base of the snowpack still consists of weaker facets. These facets are mostly a concern in thinner snowpack areas (<2 m).

Weather Summary

Scattered light flurries with a couple cm's of new snow Sunday night into Monday morning. A clearing trend starts mid-day on Monday as a high pressure system moves into the area. Alpine highs between -5 and -8°C with light NW winds are forecast. Clear skies and cool temperatures Monday night with sunshine expected on Tuesday and Wednesday.

Terrain and Travel Advice

  • Avoid thin areas like rock outcroppings where you're most likely to trigger avalanches failing on deep weak layers.
  • Cornices become weak with daytime heating or solar exposure.

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.