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Avalanche Forecast

Archived

Apr 15th, 2024–Apr 30th, 2024

Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.

Regions

Ghost.

Lower elevations have transitioned to Spring-like conditions. However, at higher elevations a winter snowpack persists. As we enter another storm cycle, continue to monitor snow amounts and winds as this will change drastically day by day.

Confidence

Low

Avalanche Summary

Field observations from the Ghost are limited so please post what you are seeing on the MIN

Snowpack Summary

Snow below treeline and even in to treeline has mostly disappeared with the exception of in gully's and canyons (Ice climbing terrain) In the early hours this will be frozen and provide easy travel and safer avalanche conditions, as the day warms or the sun's input on the slopes the snowpack will deteriorate condition's quickly

We are just about to head into another sizable spring snowstorm. Keep this is mind and consider terrain above your head as the day goes on.

Weather Summary

Cold temperatures will descend on the region until Sunday morning. This will be accompanied with some snow, 20cm or so and lots of winds. The "spring" mindset is a bit on hold until a proper diurnal cycle returns. Occasional snow storms will cross the region creating elevated hazards as they pass. Other weather elements that will increase the hazard are rain and or intense sun. Many areas at lower elevations have lost there snow cover but treeline and above is still fairly winter like.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • The more the snowpack warms-up and weakens, the more conservative you`ll want to be with your terrain selection.

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.