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Archived

Avalanche Forecast

Feb 21st, 2020–Feb 22nd, 2020
Alpine
1: Low
The avalanche danger rating in the alpine will be low
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
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
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

Regions: Glacier.

Even in times of low avalanche hazard best practices of skiing exposed features one at a time are warranted.

Weather Forecast

A mix of sun and cloud today with an alpine high of -7C and moderate ridge top winds from the SW. Scattered flurries tonight through Sunday with possible accumulations of 15-20cm. This new snow will be accompanied by moderate SW winds shifting to light NE winds on Sunday.

Snowpack Summary

Strong sun followed by an overnight freeze will leave a crust on steep solar aspects. On shaded slopes expect 20-30cm of soft snow over a well settled mid-pack. Variable stubborn wind slab can be found in alpine elevations along ridge-tops and exposed tree-line features. Steep south aspects have a sun crust buried 30-60cm below the surface.

Avalanche Summary

Solar triggered slides up to size 2 were observed yesterday on steep solar aspects. Expect this to continue today with prolonged sun.

Confidence

Avalanche Problems

Loose Dry

Watch for avalanches triggered by prolonged solar input on steep south facing aspects today. These avalanches are especially likely around rocky outcrops where daytime heating is absorbed by dark rock surfaces. Solar heating also weakens cornices.

  • Minimize exposure to steep, sun exposed slopes when the solar radiation is strong.

Aspects: South East, South, South West.

Elevations: Alpine, Treeline.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Cornices

Sporadic cornice failures have occurred over the last few days. Limit your exposure to these large triggers.

  • Cornices become weak with daytime heating, so travel early on exposed slopes.

Aspects: North East, East, South East.

Elevations: Alpine.

Likelihood: Possible

Expected Size: 1 - 2