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Archived

Avalanche Forecast

Nov 27th, 2024–Nov 28th, 2024
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
3: Considerable
The avalanche danger rating below treeline will be considerable
Alpine
4: High
The avalanche danger rating in the alpine will be high
Treeline
4: High
The avalanche danger rating at treeline will be high
Below Treeline
4: High
The avalanche danger rating below treeline will be high
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Avoid avalanche terrain.

Storm slab size and sensitivity to triggering will increase throughout the day.

Confidence

Moderate

Avalanche Summary

Only sluffing in steep terrain has been reported in the past couple days.

No other new avalanches have been reported since the weekend, but reports have been limited, especially in areas near Terrace. Please consider submitting your observations to the Mountain Information Network.

Snowpack Summary

By the morning of November 28th up to 50 cm could overlie variable snow surfaces, including small facets and/or surface hoar in sheltered areas and heavily wind-affected snow in exposed terrain.

In sheltered terrain in the northern part of the forecast region, a surface hoar layer may be found down around 80 cm.

A crust from early November can be found down 80 to 120 cm. Below this prominent crust are several other crust layers from October.

Snow depths vary across the region, but generally range from 100 to 230 cm in the alpine and about 50 to 100 cm at 1000 m.

Weather Summary

Wednesday Night

Cloudy with up to 20 cm of snow expected. 25 to 50 km/h southwest ridgetop wind. Treeline temperature -4°C.

Thursday

Cloudy with 15 to 30 cm of snow expected. 25 to 50 km/h southwest ridgetop wind. Treeline temperature -4 °C.

Friday

Cloudy  with up to 40 cm of snow expected by early morning. 40 to 60 km/h southwest ridgetop wind. Treeline temperature -5°C.

Saturday

Cloudy with up to 80 cm of snow possible. 30 to 60 km/h southwest ridgetop wind. Treeline temperature -1°C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Avoid avalanche terrain during periods of heavy snowfall.
  • Storm slab size and sensitivity to triggering will likely increase through the day.
  • As the storm slab problem worsens, the easy solution is to choose more conservative terrain.

Avalanche Problems

Storm Slabs

The size and likelihood of storm slab avalanches will increase throughout the day. The largest and most reactive slabs will likely be found on north and east aspects.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Very Likely

Expected Size: 1.5 - 3