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 14th, 2023–Feb 15th, 2023

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

Regions

Tumbler.

New snow and variable winds will continue to build wind slabs in open terrain features. Seek out sheltered areas to avoid the hazard and enjoy softer snow.

Confidence

Moderate

Avalanche Summary

No new avalanches reported in the area. Please continue to submit your observations to the MIN.

Looking forward, wind slabs formed by the recent snow and variable winds are expected to remain reactive to human triggering.

Snowpack Summary

Roughly 10 to 40 cm of recent new snow accumulated over the past few days has been redistributed by variable winds in open terrain. New wind slabs are built over old wind slabs and can be found directly lee of ridges at alpine and treeline elevations.

The snowpack in this area is generally shallow. total snow depth 200 cm at treeline. A layer at the base of the snowpack, composed of large and weak facets formed in November is widespread and most likely triggerable in steep, rocky alpine terrain.

Weather Summary

Tuesday night

Clearing overnight, trace accumulations, 40 to 50 km/h westerly winds, treeline temperatures -10 °C.

Wednesday

Becoming cloudy, trace accumulations, 40 to 50 km/h southwest winds, treeline temperatures around -8 °C.

Thursday

Increasing cloud, 2 to 5 cm new snow, 40 to 50 km/h southwest winds, treeline temperatures around -7 °C

Friday

Mainly cloudy, scattered flurries, 40 to 50 km/h southwest winds, treeline temperatures -10 °C

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
  • Avalanche hazard may have improved, but be mindful that deep instabilities are still present.

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.