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Avalanche Forecast

Archived

Apr 1st, 2024–Apr 2nd, 2024

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

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

Watch for fresh, reactive wind slabs forming at upper elevations as strong winds impact the region.

Confidence

Moderate

Avalanche Summary

A natural wet loose avalanche cycle occurred over the past few days with strong sun and warm temperatures.

Looking forward to Tuesday, wet loose avalanche activity may continue in steep terrain as temperatures stay warm. Watch for fresh, reactive wind slabs forming in lee areas as you transition into higher terrain where the surface snow remains dry.

Snowpack Summary

A crust or moist snow exists on all aspects and elevations except shady aspects in the alpine where dry snow can still be found.

The mid and lower snowpack are generally well bonded,

Weather Summary

Monday Night

Partially cloudy. Ridgetop winds southwest 20 to 50 km/h. Treeline temperature +3 °C. Freezing level 2500 m.

Tuesday

Mainly cloudy with sunny periods and light rain. Treeline temperature +3 °C. Freezing level remains at 2500 m.

Wednesday

A mix of sun and cloud with flurries, up to 5 cm accumulation. Treeline temperature -3 °C. Freezing level rises to 1300 m.

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

  • Make observations and assess conditions continually as you travel.
  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.

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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.