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Avalanche Forecast

Archived

Apr 1st, 2024–Apr 2nd, 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

South Coast, North Shore, Tetrahedron.

Pay attention to changing conditions. Fresh, reactive wind slabs are expected to form at upper elevations as temperatures drop and new snow accumulates.

Confidence

Moderate

Avalanche Summary

Small loose wet avalanche activity was reported over the past few days as warm temperatures and strong sun impacted the region.

The story changes on Tuesday as a storm impacts the region bringing strong winds and rain turning to snow. Watch for changing conditions as fresh, reactive wind slabs may form in leeward terrain features in the alpine and treeline.

Snowpack Summary

At lower elevations, rain will create a moist snow surface. At higher elevations, new snow accumulates on a crust or moist snow except high north-facing alpine where the snow surface may remain dry.

Weather Summary

Monday Night

Partially cloudy. Ridgetop winds southwest 20 to 50 km/h. Treeline temperature +2 °C. Freezing level drops to 2300 m.

Tuesday

Cloudy with rain turning to snow, 5 to 15 cm of accumulation. Treeline temperature drops to 0 °C. Freezing level drops to 1000 m.

Wednesday

A mix of sun and cloud with isolated flurries. Treeline temperature -7 °C. Freezing level at valley bottom.

Thursday

A mix of sun and cloud. Treeline temperature rising to 0 °C. Freezing level rising to 1500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Snow is accumulating at higher elevations despite lower elevations being almost snow free
  • Fresh wind slabs will likely form throughout the day, diligently watch for changing conditions.
  • Wind slabs are most reactive during their formation.

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.