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Archived

Avalanche Forecast

Feb 22nd, 2024–Feb 23rd, 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
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

Regions: Boundary, East Stikine, Howson, Kitimat, Nass, Ningunsaw, Northwest Coastal, Rupert, Seven Sisters, Shames, Stewart, West Stikine.

New snow and wind will create fresh slabs that likely sit atop various weak grains combined with crusts in the upper snowpack.

Confidence

Moderate

Avalanche Summary

A couple of skier-triggered size 1 and 1.5 slab avalanches have been reported this week in the Terrace area. These avalanches occurred on north-facing terrain at treeline and above, failing on a facet/crust combination down roughly 20 to 30 cm from the surface.

Snowpack Summary

Snowfall is burying predominantly faceted and wind-affected surfaces. New snow may have buried surface hoar in wind-sheltered terrain and a sun crust on south-facing slopes.

A couple of crusts exist in the upper snowpack that have proven to be problematic sliding surfaces over the last couple of weeks.

Below, the mid and lower snowpack is generally well-bonded and strong.

Weather Summary

Thursday Night

Cloudy with 5 to 15 cm of snow. 60 to 80 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Friday

Cloudy with 5 to 20 cm of snow. 60 to 80 km/h west ridgetop wind. Treeline temperature -7 °C.

Saturday

Cloudy with 5 to 10 cm of snow. 50 to 70 km/h southwest ridgetop wind. Treeline temperature -5 °C.

Sunday

Cloudy with 0 to 10 cm of snow. 20 to 40 km/h northwest ridgetop wind. Treeline temperature -10 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Closely monitor how the new snow is bonding to the old surface.
  • Wind slabs are most reactive during their formation.
  • Fresh snow rests on a problematic persistent slab, don't let good riding lure you into complacency.

Avalanche Problems

Wind Slabs

New snow and wind will build firm wind slabs that likely sit atop a variety of weak surfaces and hard crusts. If triggered wind slabs could step down to buried weak layers in the upper snowpack.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Likely - Very Likely

Expected Size: 1 - 2.5