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Archived

Avalanche Forecast

Mar 2nd, 2021–Mar 3rd, 2021
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
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Extreme south winds overnight will have created a smorgasbord of surfaces in exposed areas.

Be sure to re-assess as you change aspect and elevation today.

Weather Forecast

A benign weather day ahead.

Today: Cloudy with sunny periods and isolated flurries. Wind SW 20-40 km/h. Freezing level 1200m.

Tonight: Cloudy with clear periods and isolated flurries. Wind SW 20-35 km/h. Freezing level: 600m.

Wednesday: A mix of sun and cloud. Wind South 20-35 km/h. Freezing level: 1500m.

Snowpack Summary

Extreme southerly winds overnight (up to 118km/h!) will have created a variety of new surface slabs in exposed areas. Below the fresh snow transport, the upper snowpack continues to settle and gain strength. The Feb 14 drought interface is down ~1m in sheltered areas; this interface exists as buried windslabs, facets, or a thin suncrust.

Avalanche Summary

The Infrasound Detection Network in Glacier indicated some natural avalanches occurred during the extreme wind spike overnight. Yesterday, field teams were able to ski cut small size 1 wind slabs in the Dome area above 2200m. Sunday, one notable size 2.5 avalanche was observed that occurred from a steep solar feature in the alpine.

Confidence

Due to the number of field observations

Avalanche Problems

Wind Slabs

Extreme south winds overnight will have created a variety of fresh windslabs and surface conditions.

  • Use caution in lee areas. Recent wind loading has created wind slabs.
  • Watch for shooting cracks or stiffer feeling snow. Avoid areas that appear wind loaded.

Aspects: North, North East, East, West, North West.

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 1 - 2.5