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Avalanche Forecast

Archived

Feb 16th, 2023–Feb 17th, 2023

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches unlikely, human triggered possible.
Alpine
Natural and human triggered avalanches likely.
Treeline
Natural and human triggered avalanches likely.
Below Treeline
Natural avalanches possible, human triggered probable.

Regions

Northwest Coastal, Kitimat, Nass, Rupert, Seven Sisters, Shames, Stewart, Howson, Ningunsaw.

Continue to make conservative terrain choices. Ongoing wind and precipitation will keep the storm slab problem reactive.

Confidence

Moderate

Avalanche Summary

Natural wind slab avalanches were reported in lee terrain at treeline and above around Stewart and further north. These avalanches were up to size 3.

Snowpack Summary

Up to 30cm of new storm snow sits over a layer of small surface hoar, facets and wind effected surfaces. Below treeline around 10cm of new snow sits over a crust up to 950m.On north and east aspects at treeline and above storm snow has formed wind slabs.

A layer of facets and a crust from late January can be found down 100 to 200cm. Below this layer the snowpack is generally well settled and right side up.

Check out this MIN from our field team for more details.

Weather Summary

Thursday Night

Cloudy with up to 10cm of new snow expected. Light to moderate southwest winds and a low of -6 at 1500m.

Friday

Stormy with 5 to 20cm of new snow expected. Moderate to strong southwest winds and a high of -4 at 1500m.

Saturday

Cloudy with up to 15cm of new snow expected. Moderate to strong westerly winds and a high of -5 at 1500m.

Sunday

Stormy with 5 to 50cm of new snow expected. Strong southwest winds and a high of -2 at 1500m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for changing conditions today, storm slabs may become increasingly reactive.
  • Carefully evaluate steep lines for wind slabs.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks or recent avalanches.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.