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Avalanche Forecast

Archived

Mar 30th, 2023–Mar 31st, 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 possible, human triggered probable.
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.

Regions

Coquihalla, Harrison-Fraser, Manning, Skagit.

New snow on Friday will be redistributed by southwest winds.

Seek out sheltered terrain for the best riding.

Confidence

Moderate

Avalanche Summary

On Thursday there was a report of a small natural wet loose avalanche at below treeline other than that there have not been any avalanche reports for a week now.

If you head out in the backcountry, let us know what you are seeing by submitting a report to the Mountain Information Network.

Snowpack Summary

New snow falling Friday will be redistributed by southwest winds. Winds this week have been from all directions so you may find new and lingering wind slabs on all aspects.

Below the recent snow is a melt-freeze crust, existing on all aspects at treeline and below. The crust extends to mountain tops on sunny aspects. In north-facing high alpine terrain, the surface snow may have remained cold and dry.

The mid and lower snowpack consists of a number of old crusts and facetted snow that continue to be monitored, particularly in shallow snowpack areas.

Weather Summary

Thursday Night

Cloudy, potential trace accumulation, winds southwest 20 to 30 km/h, freezing levels dropping down to 900 m.

Friday

Cloudy, 10 cm accumulation, winds southwest 35 km/h gusting to 60, freezing levels up to 1200 m.

Saturday

Cloudy, 10 to 20 cm accumulation overnight and up to another 10 throughout the day, winds southwest 25 to 35 km/h, freezing level at 1000 m.

Sunday

A mix of sun and cloud, trace accumulation, winds southwest 15 km/h, freezing levels up to 1200 m.

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.
  • Seek out wind sheltered terrain below treeline where you can avoid wind slabs and find great riding.
  • Be carefull around freshly wind loaded features.

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.