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Avalanche Forecast

Archived

Apr 7th, 2023–Apr 8th, 2023

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

Regions

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

Watch for changing conditions as you move through different aspects and elevations. Small wind slabs may linger at higher elevations.

Confidence

High

Avalanche Summary

On Tuesday a size 1 rider triggered wind slab was reported.

Avalanche activity has tapered off but reactivity remains possible on isolated features or where new wind loading is occurring. Observations are also limited at this point in the season, please post any information or photos you have on the Mountain Information Network to help guide our forecasts.

Snowpack Summary

Around 30 cm of recent snowfall is available at higher elevations to be/or have been redistributed into wind slabs on north facing terrain features. This sits over wind affected surfaces or a crust on south facing slopes that extends into the alpine.

The middle of the snowpack is strong and contains numerous hard crusts. Near the ground, weak faceted crystals exist. There hasn't been avalanche activity on this layer recently, but it remains on our radar as it may become active with abrupt changes to the snowpack, such as rapid loading (heavy snowfall or rain) or prolonged warming.

Weather Summary

Friday Night

Cloudy, 5 cm of snow. Moderate to strong southerly winds, freezing levels around 1000 m.

Saturday

Cloudy with strong to extreme southerly winds. Up to 5 cm of snowfall again. Freezing levels 1000-1500 m.

Sunday

Cloudy with up to 10 cm of snow. Strong to extreme southerly winds. Freezing levels 1000-1500 m.

Monday

Mix of sun and cloud with light snow possible. Freezing levels around 1000 m. Moderate southwest winds.

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.
  • Carefully evaluate steep lines for wind slabs.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.

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.