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Avalanche Forecast

Archived

Nov 30th, 2022–Dec 1st, 2022

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

Regions

Northwest Inland, Kispiox, Microwave-Sinclair, Ningunsaw, South Bulkley, South Bulkley, Telkwa.

Continue to assess for wind slab as you move through terrain. Wind slabs could be found on all exposed terrain at treeline and above. As the cold temps settle in be sure to increase your margin for safety.

Confidence

Moderate

Avalanche Summary

No new avalanches were observed in the past couple days.

Thank you for all the great Mountain Information Network reports! They are beneficial to us in the early season when we have limited information and data sources. Please keep them coming!

Snowpack Summary

Over the past few days strong easterly winds have scoured east slopes and created wind slab on south and west facing slopes.

A layer from mid November is buried down around 70cm. This layer consists of surface hoar, facets and a crust below treeline and on south facing slopes.

The depth of the snowpack at treeline varies from 80-140 cm and tapers rapidly below treeline.

Many early-season hazards such as rocks, stumps, and open creeks exist below treeline.

Weather Summary

Wednesday night

No new snow expected. Moderate to strong northeast winds with a low of -24 at 1600m.

Thursday

Cloudy with the possibility of light flurries bringing trace amounts of new snow. Light southeast winds increasing in the afternoon and returning to northeast. High of -18 at 1600m.

Friday

A mix of sun and cloud with the potential for flurries bringing 5 cm of new snow along the eastern slopes near smithers. Light northeast winds and a low of -21 at 1600m.

Saturday

Clear skies with no new snow expected. Light northeast winds. Potential for temperature inversion.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Stay off recently wind loaded slopes until they have had a chance to stabilize.
  • Use ridges or ribs to avoid areas of wind loaded snow.

Problems

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.