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Avalanche Forecast

Archived

Apr 9th, 2024–Apr 10th, 2024

Alpine
Natural avalanches possible, human triggered probable.
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

Glacier.

Winter is back for those willing to travel into the higher elevations!

Snowfall, followed by strong, gusty winds, have created storm slabs in the Alpine and open Tree-line slopes.

These new slabs will become very reactive if/when the strong Spring-time sun shines on them!

Confidence

Moderate

Avalanche Summary

A field team in the Christiana Ridge zone was able to ski-control moist storm slabs on steep solar aspects. Though sluggish to start moving, these slow slabs gathered considerable mass, sliding on the April 9 melt/freeze crust.

Snowpack Summary

In the Alpine and Tree-line 20-30cm of new snow sits over a firm crust on solar aspects and well settled dry snow on northerly aspects.

At tree line the snow depth is at a record low of around 220cm. The Feb 3rd crust/facet layer persists at upper elevations, buried down 80-140cm.

Below tree line is a well-settled spring snowpack with a strong surface crust that will break down during the heat of the day.

Weather Summary

A brief clearing Wed, then flurries return Thur/Fri

Tonight: Clear, Alp low -8°C, light/gusting mod W winds, freezing level (FZL) 900m.

Wednesday: Mix of sun & cloud, light SW winds, Alp high -3 °C, FZL 1900m.

Thursday: Flurries, 5cm, Alp high -2°C, light SW winds, FZL 1800m.

Fri: Cloudy with isolated flurries, Alp high -2°C, light/gusting mod SW winds, FZL 1900m.

Terrain and Travel Advice

  • Minimize exposure to sun-exposed slopes when the solar radiation is strong.
  • Carefully monitor the bond between the new snow and old surface.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks or recent avalanches.

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.