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Archived

Avalanche Forecast

Apr 9th, 2024–Apr 10th, 2024
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

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.

Avalanche Problems

Storm Slabs

The new snow will need time to bond to the old surfaces, especially where it sits over a firm crust on solar aspects. Use extra caution near ridge crests and lee features where deeper wind deposits will be more reactive. Expect natural avalanches on solar aspects when the Spring sun shines!

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 2.5