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Archived

Avalanche Forecast

Apr 21st, 2025–Apr 22nd, 2025
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
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
Below Threshold
The avalanche danger rating below treeline will be below threshold
Alpine
1: Low
The avalanche danger rating in the alpine will be low
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
Below Threshold
The avalanche danger rating below treeline will be below threshold

Regions: Glacier.

Recently formed storm slabs will settle out over the next few days. Skier triggering remains possible on steep slopes, especially near ridgetop.

Carefully evaluate how the new snow is bonding to the buried crust before stepping into consequential terrain.

Confidence

High

Avalanche Summary

Soft, surface storm slabs were reactive to ski cuts on steep slopes in the Chris Ridge area on Monday. These storm slabs ranged from 10-25cm thick (size 1-1.5) and were running far due to the crusty bed surface.

Size 1 dry loose natural avalanche activity was observed in the alpine as well but visibility was limited at upper elevations.

Snowpack Summary

10-20cm of new snow Sunday- Monday with moderate wind has created a soft storm slab. These fresh storm slabs sit over a crust which exists on solar slopes in the alpine & on all aspects below 2200m. This Crust will support a skier in most locations and may act as a firm bed surface.

Alpine N facing slopes may not have a crust effecting ski quality but storm slabs will be deeper & more reactive here due to wind loading.

Challenging travel and variable conditions at lower elevations.

Weather Summary

Weather begins to improve as a ridge of high pressure builds.

Tonight Clear with cloudy periods. No precipitation. Wind NW 15-35 km/h. Freezing Level (FZL) 700m.

Tuesday A mix of sun and cloud. No precip. Alpine high -3 °C. Ridge wind NW 10-20 km/h. FZL1900m.

Wed A mix of sun and cloud. No precip. Alpine high -1. Wind N 10. FZL 2100m.

Thursday Sunny with cloudy periods. No precip. Alpine high +4. Wind SE1 0. FZL 2600m.

Terrain and Travel Advice

  • Closely monitor how the new snow is bonding to the crust.
  • Keep in mind a buried crust offers an excellent bed surface for avalanches.
  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.

Avalanche Problems

Storm Slabs

Moderate winds and recent snowfall has created a storm slab at treeline and above. Use extra caution in lee terrain (North, NE, and East) as wind transport will make storm slabs thicker and more reactive on these aspects.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2