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Avalanche Forecast

Archived

Apr 11th, 2024–Apr 12th, 2024

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

Regions

Sasquatch, Sasquatch, Coquihalla, Harrison-Fraser, Manning, Skagit.

Use caution in wind-affected terrain, human-triggered wind slab avalanches remain possible.

Confidence

Moderate

Avalanche Summary

No new avalanches were reported in this region over the past few days. However, field observations are currently very limited.

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

Snowpack Summary

Up to 10 cm of recent snowfall overlie 10 to 15 cm of settling snow that has been redistributed by strong southwest winds into wind slabs on lee features at treeline and above.

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

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

Weather Summary

Thursday Night

Cloudy with 5 to 10 of new snow accumulation above the rain-snow line. 20 to 50 km/h southwest ridgetop wind. Treeline temperature -1 °C. Freezing level 1500 m.

Friday

Cloudy with afternoon clearings. Light variable ridgetop wind. Treeline temperature reaches a high of +1 °C. Freezing level rises to 1800 m.

Saturday

Mostly sunny. 15 to 30 km/h southwest ridgetop wind. Treeline temperature reaches a high of +5 °C. Freezing level rises to 2500 m.

Sunday

Mostly sunny. 15 to 40 km/h southwest ridgetop wind. Treeline temperature +2 °C. Freezing level 2100 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Stay off recently wind loaded slopes until they have had a chance to stabilize.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks or recent avalanches.
  • Avoid being on or under sun exposed slopes.

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.