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Avalanche Forecast

Archived

Feb 10th, 2023–Feb 11th, 2023

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

Regions

South Coast Inland, Birkenhead, Duffey, South Chilcotin, Stein, Taseko.

Wind slabs may have formed in exposed areas

Carefully monitor the snow as you move through the terrain.

Confidence

Moderate

Avalanche Summary

A local operator reported having seen a large avalanche on Wednesday morning in the northern area of our region. It is believed that this occurred naturally from the load of the new snow but that it stepped down to weak layers buried further down.

On Tuesday there were a couple of storm slab avalanches reported in our region. The most notable was one triggered remotely by a skier. It was believed that it slid on a crust formed near the end of January. Also on Tuesday, a group from Keith's Hut reported that they could hear a number of avalanches coming from what they thought was Joffre Peak.

Please continue to share any observations or photos on the Mountain Information Network.

Snowpack Summary

In sheltered areas, the 25 to 35 cm of the snow pack will be of fresh snow that fell earlier this week. At higher elevation this new snow will be redistributed into wind slabs by southerly winds. Further down in elevation this snow was and still may be moist or wet, caused by warm temperatures and rain. Due to cooling temperatures a crust may have already formed. There may be a series of crust found 50 cm and again 80 cm deep. These layers have been somewhat reactive in snow pit tests.

The snowpack in this region is generally weak and shallow with sugary snow near the base. Snowpack depths around treeline range between 150 to 250 cm.

Weather Summary

Friday Night

Mostly cloudy, trace accumulation, winds southwest 10 km/h, treeline -8 °C.

Saturday

A mix of sun and cloud, trace accumulation, winds south southwest 10 km/h, treeline -7 °C.

Sunday

Mostly cloudy, up to 5 cm accumulation, winds southwest 20 km/h, treeline -5 °C.

Monday

Mostly cloudy, up to 10 cm accumulation, winds southwest 15 to 20 km/h, treeline -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.
  • Be carefull around freshly wind loaded features.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.

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.

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.