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Avalanche Forecast

Archived

Apr 7th, 2024–Apr 8th, 2024

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

Regions

Coquihalla, Harrison-Fraser, Manning, Skagit.

New snow and southwest wind may form wind slabs on lee features at treeline and above.

Recent wind has varied in direction, so watch for wind slabs on all aspects.

Confidence

Moderate

Avalanche Summary

No recent avalanche observations have been reported in this region. However, data is currently very limited.

If you go into the backcountry, please consider submitting your observations to the Mountain Information Network.

Snowpack Summary

Up to 20 cm forecast snow and southwest wind may form wind slabs on lee features at treeline and above. Recent wind has varied in direction, so watch for wind slabs on all aspects.

Below the new snow is a crust everywhere except true north facing terrain at upper elevations.

The mid/lower snowpack is generally well settled and strong.

Many areas below treeline are either snow free or have very thin snow coverage. Expect difficult travel at lower elevations.

Weather Summary

Sunday Night

Cloudy with flurries, 3 to 10 cm snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -5° C. Freezing level 900 m.

Monday

Mostly cloudy with flurries, 3 to 15 cm snow during the day and another 15 to 25 cm overnight. 30 to 40 km/h southwest ridgetop wind. Treeline temperature -2 °C. Freezing level 1600 m.

Tuesday

Mix of sun and cloud with isolated flurries, 3 to 5 cm snow. 40 to 50 km/h southwest ridgetop wind. Treeline temperature -3 °C. Freezing level 1500 m.

Wednesday

Mix of sun and cloud. 10 to 20 km/h southwest ridgetop wind. Treeline temperature 1 °C. Freezing level 1800 m.

Check out the Mountain Weather Forecast for additional weather information.

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.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.

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.